A picture of a distant, shark-shaped cloud of gas in space has earned the top prize in a Royal Observatory Greenwich contest for amateur space photographers.

Dubbed "The Quiet Predator," the image by skywatcher Ali Alobaidly shows off the Shark Nebula (LDN 1235), which is roughly 650 light-years from Earth in the constellation Cepheus. (For perspective, the nearest star system to our planet is only about 4 light-years away.) The stunning image was chosen as the overall winner of the Royal Observatory Greenwich's 18th ZWO Astronomy Photographer of the Year contest, whose honorees were announced Thursday (Sept. 17).

Alobaidly took the prize-winning image from the Jahra governorate in Kuwait over two days in August 2025, using an Askar 140 APO telescope, a Sky-Watcher EQ8-R mount and a ZWO ASI2600MM Pro camera.

"The juxtaposition of an oceanic predator, prowling the skies above the Kuwaiti desert, is something I find deeply poetic, and it is what first drew me to this remarkable region of the sky," Alobaidly said in a statement. "To me, it represents perfectly my love for both the universe, and the deserts of my ancestors."

Alobaidly's work, as well as 10 ZWO Astronomy Photographer of the Year category winners, will be on display at the National Maritime Museum in London starting Friday (Sept. 18). Alobaidly received a prize of 10,000 British pounds (about $13,300), while category winners and runners-up received various smaller cash prizes.

Below are several of the individual category winners, along with their breathtaking photos.

Aurorae: "The Crown," by Radoslav Sviretsov (Bulgaria). This image was captured during a strong northern lights display at a small church between Keflavík and Reykjavík, Iceland. The statement noted that the location is "far from light pollution ‪—‬ a place where the sky remains dark and truly alive."

Our Moon: "Venusian Pearl on the Moon," by Petr Horalek (Czechia). This image was taken on Sept. 19, 2025, when the moon passed in front of Venus from the perspective of select locations on Earth. "The most beautiful moment was when Venus had just started to disappear behind the crescent. It looked like a bright pearl on the lunar limb," the observatory judges stated. (Horalek is no newcomer to astrophotography, and Live Science has featured several of his incredible images before.)

Our Sun: "Active Region 4122," by Miguel Claro (Portugal). Claro, a frequent contributor to Space.com, a sister site of Live Science, used a new dual-band telescope to capture the sun's photosphere, or visible surface layer. Claro's work shows convection cells, which are superheated gas or plasma regions on the sun, as well as bright spots between these regions.

People and Space: "A Message from the Ancients," by Max Inwood (Aotearoa/New Zealand). Inwood showcased petroglyphs (ancient rock art) in California's desert in his prize-winning photo. The petroglyph in the image is believed to show the 13 full moons Earth usually witnesses each year.

Planets, Comets & Asteroids: "Saturnian Equinox," by Tom Williams (U.K.). Saturn's rings appear edge-on from the perspective of Earth in this 2025 image showing a rare event during the planet's near-30-year circuit of the sun. Williams' photo displays "the start of local spring in the planet's southern hemisphere," observatory representatives stated.

Skyscapes: "Botswana Star Trail," by Stefano Pellegrini (Italy). This image was captured in Botswana in a location called Nxai Pan, which has large baobab trees. "Pellegrini played with the exposure and saturation, resulting in this almost psychedelic image," observatory representatives said.

Galaxies: "NGC 4753: A Symphony of Dust Lanes in Virgo," by © 智鹏 严and Xinran Li (China). This image, taken in Chile, showcases NGC 4753, a galaxy roughly 60 million light-years from our planet, in the constellation Virgo. The photo highlights a "striking network of dust lanes swirling around its luminous core," observatory representatives explained.

To see the full list of winners and the judges' statements, visit the contest website.

Editor's note: This article was updated on Sept. 18 at 9:30 a.m. ET. An earlier version mistakenly called the constellation Cepheus 'the whale'. In fact, Cetus is 'the whale' constellation.

A "baby" exoplanet, discovered emerging from its cosmic cocoon around a nearby star, is the youngest alien world ever seen, a new study reveals. The planetary infant is less than 1 million years old and could help researchers study how other planets, including our own, took shape.

The juvenile world, dubbed Elias 2-24 b, orbits a newly formed star around 450 light-years from Earth. It is somewhere between two and four times as massive as Jupiter and almost twice as far from its home star as Neptune is from the sun.

Astronomers spotted initial signs of the hefty exoplanet in 2017, when they noticed a small gap in the star's protoplanetary disk — the swirling ring of gas, dust and other stellar debris left over from the star's creation. This gap strongly implied that an exoplanet had formed there after enough of the disk's spinning material had gravitationally clumped together, the process by which most planets form. However, the alien world was not directly visible at the time.

In the new study, published Sept. 16 in The Astrophysical Journal Letters, researchers combined observations from three telescopes — the W. M. Keck Observatory in Hawaii, the Atacama Large Millimeter/submillimeter Array in Chile and the European Southern Observatory’s Very Large Telescope, also in Chile — to take a closer look at the gap in the protoplanetary disk. Not only was the team able to directly image Elias 2-24 b and confirm its existence, but the researchers also dated it, revealing that the alien world is likely less than 1 million years old.

"What makes Elias 2-24 b so remarkable is its age," study first author Andrea Bernardi, a doctoral student with the Institute of Astrophysical Studies (IEA) at Diego Portales University in Chile, said in a statement. "This is the youngest planet detected so far, and because it is still actively accreting material from its surroundings, we're able to observe a stage of planet formation that is rarely seen directly."

The newly confirmed exoplanet is roughly 5,000 times younger than Earth or around 0.008% the age of the oldest known exoplanet, PSR B1620-26 b or "Methuselah," which formed around 1.1 billion years after the Big Bang. Compared to the average human lifespan, this makes Elias 2-2 b roughly equivalent to a two- or three-day-old baby.

Record setter

This is not the first time that astronomers have spotted baby exoplanets. But until recently, there has been an age limit on when they become visible to us.

For a long time, the youngest-known exoplanets, which included several worlds orbiting the star PDS 70, were around 5 million years old. This is because telescopes were not powerful enough to spot exoplanets until they had cleared a large enough gap in their star's protoplanetary disks. But advances in telescope design and data analysis have helped researchers push past this age limit: For example, in 2024, astronomers discovered TIDYE-1b, which is believed to be around 3 million years old; and in 2025, scientists detected AB Aurigae b, which could be as young as 2 million years old.

Elias 2-24 b is at least twice as young as any known exoplanet, which is a significant step forward. This provides scientists with a rare opportunity to fill in the current knowledge gaps surrounding the initial stages of planet formation.

"Our planet-formation models already struggled to explain the previous record holders for the youngest known planet," Lucas Cieza, an IEA astronomer who led the 2017 study that first spotted the gap left by Elias 2-24 b, said in a second NASA statement. "Elias 2-24 b shows us that even our best planet-formation models are still missing some important processes."

Mind the gaps

A majority of the more than 6,000 exoplanets discovered so far have been spotted via the transit method, where a distant world passes between its home star and Earth, causing a temporary dip in the star's brightness. However, this doesn't work if the alien worlds lurk within a protoplanetary disk, because the swirling debris cloud permanently dims the star's light when viewed side-on. This has created a bias toward finding older exoplanets.

The only way to spot a juvenile exoplanet is if a star's protoplanetary disk is perpendicular to Earth, so that we are looking at it from the top down or bottom up and can clearly see any gaps within it. But this is much harder because the light from the star often outshines the disks, meaning we are "mostly blind to these baby planets right now," Cieza said.

However, this could change thanks to NASA's soon-to-be-operational Nancy Grace Roman Space Telescope, which launched into space Aug. 30 and is currently calibrating its instruments before beginning its potentially decades-long mission to observe the cosmos. The space telescope is equipped with a state-of-the-art starshade, or coronagraph, which blocks out the light from distant stars, making it easier to study their surroundings. Experts predict that Roman could spot up to 100,000 new exoplanets during its mission and will have less of a bias toward older planets, meaning we should find many more planetary infants.

"This is just the beginning of a new era of discovery," Cieza said. "Roman will take planet hunting to the next level."

The rings around a strange small body orbiting between Saturn and Uranus look mysteriously different from previous views, new observations from the James Webb Space Telescope (JWST) suggest.

The rings encircle Chariklo, which is a centaur, a strange type of object that shows characteristics of both asteroids and comets. Chariklo is only about 400 miles (250 kilometers) in diameter and is part of a large group of tiny objects in the distant solar system.

Scientists first discovered Chariklo's rings in 2013 — making it the first small solar system body found to have rings — and studied them with ground-based telescopes again in 2014 and 2017. When JWST took another look at Chariklo in 2022, a decade had brought a lot of difference, according to a study published Sept. 9 in the journal Science Advances.

"By comparing JWST observations with those obtained … over the last decade, we discovered opposite changes in the two rings: while the inner ring shows significantly higher opacity, the outer ring shows lower opacity, " Pablo Santos-Sanz, a researcher at the Institute of Astrophysics of Andalusia and first author of the study, said in a statement.

Researchers don't know exactly how the changes took place, but the study authors offered three suggestions. The first is that JWST, which has a fine resolution, was able to see both denser and sparser zones of the rings than previous observations showed. The second is that there were changes in the rings' material or in the grains themselves. Finally, a third possibility is that JWST could see "grains with wavelength-dependent optical properties," meaning the telescope saw effects in composition and grain size that explain the variability.

Santos-Sanz said the research suggests that small bodies with rings — even those orbiting far away from the gravitational influences of planets — may have more changes in their systems than scientists previously thought. "Our results force us to rethink how they form, how they evolve, and what mechanisms maintain their stability," he said.

A theoretical follow-up observation, taken the next time Chariklo passes in front of a star, would help to confirm the new JWST results, the researchers added — especially the apparent decreased opacity of one of the rings and the increased opacity of the other.

"These observations would help disentangle temporal evolution from wavelength-dependent scattering effects, and clarify the physical processes shaping Chariklo’s rings," the researchers stated in the study.

A JWST milestone

The new observations of Chariklo also mark the first time that scientists have planned a JWST viewing campaign specifically around a stellar occultation — that is, the researchers timed the viewing precisely to when Chariklo passed in front of a distant star from the telescope's point of view.

All observations of Chariklo's rings, on the ground and in space, have used stellar occultations. That's because the rings are too faint to be imaged directly, so astronomers must instead learn more about the rings by measuring the dips and increases in brightness as Chariklo passes in front of the background star. Scientists use a similar method to study the atmospheres of alien planets with JWST's infrared instruments.

Chariklo's speed relative to JWST was low, at 1.5 miles per second (2.5 kilometers per second), allowing for fine imaging of the rings. To time the occultation, the researchers used info from the European Space Agency's Gaia mission, which precisely charts the locations and movements of more than 2 billion stars, as well as calculated the orbit of JWST at a location roughly 930,000 miles (1.5 million km) from Earth in the opposite direction of the sun. According to the researchers, the planning and execution of the mission required "extreme precision."

Given that it's the closest planet to the sun, Mercury seems like it should be the hottest planet in our solar system.

However, at a blistering 900 degrees Fahrenheit (480 degrees Celsius), Venus tops Mercury's 800 F (430 C) highest surface temperature, despite being an average of 31 million miles (50 million kilometers) farther from the sun. So how can the second planet from our star be hotter than the closest planet to it?

It all comes down to reflectivity, atmospheric composition and geological history, experts told Live Science.

Totally different atmospheres

A planet's distance from its star is not the only factor that influences the planet's temperature.

"Distance tells us how much sunlight arrives at a planet, but it does not tell us how much is reflected … absorbed, how efficiently heat escapes, or how effectively the atmosphere transports heat around the planet," Stephen Kane, an astrophysicist who studies planetary habitability at the University of California, Riverside, told Live Science in an email. "Those properties can be just as important as distance, and sometimes much more important."

Mercury makes the case in miniature. According to Kane, the planet has essentially no atmosphere, so incoming sunlight strikes bare rock directly, heating it to extreme temperatures during the day. But with barely anything overhead to trap that warmth, Mercury radiates it straight back into space the moment the sun sets. As a result, nighttime temperatures plunge from roughly 800 F (430 C) during the day to about minus 290 F (minus 180 C) at night ‪—‬ a swing of well over 1,000 degrees, he added.

Venus tells the opposite story. Wrapped in an atmosphere that's roughly 90 times as dense as Earth's and consists almost entirely of carbon dioxide, Venus traps heat so effectively that its surface temperature barely changes at all, no matter where the sun happens to be, Kane explained.

A permanent blanket

Sunlight arrives at a planet mostly as near-infrared radiation and visible light, which pass through atmospheres consisting primarily of gases such as nitrogen, oxygen and carbon dioxide with relatively little trouble. Once the ground and lower atmosphere absorb that energy, though, they re-release it as infrared radiation, the kind of energy we feel as heat. Carbon dioxide happens to be excellent at grabbing and holding on to infrared radiation, Kane noted.

On Venus, the atmosphere is so deep and loaded with carbon dioxide that infrared energy leaving the surface gets absorbed and re-emitted over and over before any of it finally escapes into space. Some of that energy gets redirected back downward, Kane said, further warming the planet's lower atmosphere and surface. However, the heat isn't trapped forever, since energy conservation means that Venus must eventually release the same amount of energy it absorbs.

Notably, Venus doesn't actually soak up more sunlight than Mercury overall. Thick cloud cover reflects roughly three-quarters of incoming sunlight back into space before it ever reaches the ground, and only about 3% of the sunlight that arrives at Venus makes it down to the surface, Kane said. In fact, if that atmosphere and cloud deck were stripped away, a bare-rock Venus would actually run cooler than Mercury, since it would be receiving only about 29% as much sunlight from the start, he explained. It's the blanket, not the sunbathing, that makes Venus the hotter world.

Where the blanket came from

Venus' atmospheric blanket didn't spring into existence all at once, and how it formed is its own open question. Venus shows strong evidence of past and present volcanic and tectonic activity acting to smother the planet in greenhouse gases, Paul Byrne, a planetary scientist and associate professor of Earth, environmental and planetary sciences at Washington University in St. Louis, told Live Science in an email.

This volcanic activity has been so intense that Bryne describes modern Venus as sitting in a "post-runaway greenhouse" state, where its extreme heat has become a self-sustaining process regardless of what the planet's interior is doing at any given moment.

The heat isn't being generated from below; it's a consequence of the atmosphere Venus already has, locked in place by the same infrared-trapping effect described above.

Taken together, the experts' answers point to the same underlying lesson: How close a planet sits to its star is only the opening chapter of its climate story. What kind of atmosphere it has and how effectively that atmosphere holds on to heat are usually responsible for the rest.

See how well you know our planetary neighborhood with our solar system quiz!

Mercury, which is about one-third the size of Earth, may have shrunk more in its evolution than scientists originally thought.

A new study suggests that the tiny planet may have contracted 10% to 30% more than previous models suggested — meaning the planet’s total diameter shrunk almost 12 miles (19 km) since Mercury was formed. (Mercury’s diameter today is roughly 3,032 miles (4,880 km).

Previous missions overlooked the extent of the shrinkage because impact-crater debris on Mercury's surface hid the evidence, according to a study published Thursday (Sept. 10) in the journal Geophysical Research Letters. That size difference is important when researchers consider the planet's history, said Gaku Nishiyama, a planetary scientist at the German Aerospace Center Institute of Space Research and an author of the study.

"Because Mercury's evolution is driven by its cooling, the amount of contraction — an indicator of the extent of cooling — is one of the most important observables that can be compared to models for estimating its evolution scenario," Nishiyama told Live Science in an email.

There could also be implications for the planet's composition. For example, more shrinkage at Mercury could mean the planet would have a larger metal core and fewer light elements, such as silicon, inside that core, according to an American Geophysical Union statement.

"The interior of Mercury would reflect its formation," Nishiyama said, and possibly hint at the innermost part of our solar system. "Therefore, to understand how our solar system has evolved up to now, information that can be extracted from this estimation — such as core composition and initial temperature condition — is critical."

A violent history

Mercury and the rest of the solar system planets formed due to the gradual collisions and aggregations of rock and gas upon asteroids and comets. Some of those impacts that created the planets also released a lot of heat. Mercury has been slowly cooling from those ancient impacts, and its interior has been shrinking along the way.

While this kind of cooling affects the entire planet's landscape, impact craters can mask the effects because each crash into the surface generates its own surface changes, including debris and new divots. The craters build up over time, making it difficult to spot more ancient geology underneath.

Nishiyama's team compared two sets of maps from Mercury, using data from NASA's MESSENGER mission, which orbited Mercury between 2011 and 2015. One set of maps charted geological features showing contraction, and the other set estimated the roughness of the planet's surface. Their work covered the entire surface and demonstrated that the most rugged spots on the planet have fewer wrinkles from shrinking. In other words, according to Nishiyama, the debris from more recent impacts is covering up the evidence of shrinking.

Nishiyama said more information will help to confirm the estimate. Such data could come from the European Space Agency's BepiColombo spacecraft, which began its arrival sequence at Mercury earlier this month after nearly eight years of space travel. Once the mission settles in, the spacecraft will take higher-resolution imagery of the surface than MESSENGER did. Nishiyama's team expects BepiColombo to pick up smaller impact craters, as well as scarps and ridges, that could further refine the measurements.

"Stay tuned for future topography measurements by BepiColombo," Nishiyama said. "Future data from laser altimetry on BepiColombo will collect more information on planetary contraction by measuring topography more precisely."

Astronomers just dropped a video 27 years in the making: the highest-definition animation of a gargantuan black hole jet blasting out of a distant galaxy and twisting off into space.

The video, made from 116 images taken between 1995 and 2022, captured a blazar known as 3C 345, in the constellation Hercules. A blazar is a sort of quasar — a bright, feeding supermassive black hole embedded in the center of a faraway galaxy — that emits huge jets of gas into its environment. The jets blaze at nearly the speed of light and are charged with highly concentrated X-rays and gamma rays.

As described in an Aug. 26 study in the journal Nature, scientists gathered the images of 3C 345 using decades of observations by the Very Long Baseline Array (VLBA), a network of 10 telescopes spread across the U.S. (VLBA had two programs that caught views of the jet, called BEAM-ME and MOJAVE, which collectively followed hundreds of blazar sources.)

To turn those hundred-or-so images into an animated movie, the team used an AI neural network named Kine, achieving a resolution four times higher than that of any individual image. By doing so, the researchers mapped the speed of the black hole jet to the highest precision yet. (Several study co-authors had previous experience boosting the resolution of distant black hole images while working at the Event Horizon Telescope Collaboration, the team behind the first image of a black hole.)

"The higher quality of our video reconstruction enabled a detailed measurement of the plasma velocity in the jet," study first author Marianna Foschi, a postdoctoral researcher at Caltech, told Live Science in an email.

A big, bright surprise

The researchers were surprised to see that the mighty jet's brightest components were flying at 10 to 13 times the speed of light while the gas surrounding it was zooming at about nine to 12 times the speed of light.

"This is unexpected because the general consensus is that these bright components are shock perturbations moving through the plasma, and as such they should have a higher velocity compared to the surrounding fluid," Foschi said. "Our work does not invalidate the shock model in general, but it puts it into question, at least in the case of this specific source."

VLBA uses radio antennae across the continental U.S. to map the sky, providing a wide view of the universe. But while VLBA has a comprehensive view of the sky, it lacks very fine details. The array is designed to generate a two-dimensional image with elements based on a measurement between two of the array's telescopes. Because the array has only 10 telescopes to do those measurements, however, its pixel resolution is limited.

That's where the Kine AI model makes a difference. The goal of Kine's work, Foschi said, is to develop an imaging algorithm that can create videos of observations at different times, focused on astronomical sources with variable brightness.

Kine is a neural network — a type of machine learning model that uses layers of "neurons" (computing nodes) to learn from a dataset, similar to the way a human brain learns. Kine can "process observations at different times, while learning and leveraging the spatio-temporal correlations present in the data," the research team wrote in the paper, referring to time and the three dimensions of space.

Foschi said the team is eager to apply Kine to other astronomical observations. "We believe this method will drastically change the way jet dynamics is studied from observations," she said. "In fact, our method enables a precise measurement of the projected velocity at any point in the jet."

See how much you know about black holes with our black hole quiz!

The moon may have formed in as few as five hours after the cataclysmic collision between Earth and a long-lost protoplanet, new simulations suggest. The surprising findings could help shed light on other historic impacts throughout our cosmic neighborhood and beyond.

Experts strongly suspect that the moon was created when a Mars-size space rock called Theia smashed into an early version of our planet, back when the solar system was young and extremely unstable. This colossal impact likely would have turned the once-neighboring worlds into spinning clumps of molten rock that eventually coalesced and cooled into the versions of Earth and the moon we see today. Without this collision, which also may have left chunks of Theia buried deep within our planet, many scientists think that life may have never existed on Earth.

Lunar rocks collected during NASA's Apollo missions have provided evidence to support this theory, dubbed the giant impact hypothesis. These samples also tell us that the moon is around 4.5 billion years old, meaning the collision occurred roughly 100 million years after the sun was born. But although scientists have previously simulated the impact event, it has been tricky to ascertain exactly how the moon formed and how long it took to emerge after the Earth-Theia collision.

In the new study, published Sept. 1 in The Astrophysical Journal Letters, researchers conducted a series of simulations focusing on the varying potential geological properties of both Earth and Theia prior to their collision. This factor has been relatively understudied until now.

"When you simulate the Earth and the moon as colliding bodies with [different] geologic properties, it changes how the moon forms out of that impact — that's something we considered unnecessary before," study first author Adeene Denton, a geologist and planetary scientist at the Southwest Research Institute in Boulder, Colorado, said in a statement.

Until now, simulations of the Earth-Theia impact have focused mainly on the masses of the colliding neighbors. But in the new study, the researchers were most interested in the material strength of the two bodies, particularly the hardness of their exteriors.

"Models have evolved to include material strength, something that's really important when you're studying collisions between smaller bodies like asteroids," Denton said. "We weren't sure if it would matter for the moon or not. When we did the simulations, we found it actually matters quite a bit."

The main factor in the strength of colliding bodies is temperature. Both Earth and Theia were very young when they smashed together, so they were still hot and had soft or molten surfaces. These properties would have cushioned the collision, allowing the debris to stay largely intact and enabling the moon to form more quickly. But when the giant impact hypothesis was first proposed (in 2001), researchers initially thought the collision occurred much later, meaning that the bodies would have cooled and become more brittle. In this case, their collision would have created a larger field of rocky debris that would have taken longer to coalesce.

Researchers simulated the collision using a range of potential temperatures and found that under the most extreme scenario — where the pair were at their hottest — the moon could have formed in just five hours. However, this is just one potential outcome, and there is no way of knowing exactly how hot — and, therefore, how strong — Earth and Theia really were when they smashed together.

When the moon took shape, it was initially covered with a magma ocean that took hundreds of millions of years to solidify. Even then, its increased proximity to Earth meant that it was likely a volcanic hellscape. However, over time, it moved away from our planet, cooling further, and it is now assumed to be geologically dead. (The moon is continuing to slowly move away from us and could eventually escape our planet's gravity entirely, if the dying sun doesn’t destroy it and us first in around 5 billion years.)

The new simulations highlight the importance of material strength in planetary impact modeling, which could change what we know about other ancient collisions, like the one that knocked Jupiter's moon Ganymede off its axis or the one that birthed Saturn's moon Titan.

Additionally, the findings could have implications in the search for exomoons — the hypothetical moons of distant exoplanets, which have so far remained elusive, according to Live Science's sister site Space.com. Until now, one of the main ways astronomers have been hunting for these alien satellites is by looking for debris fields around exoplanets. However, if the moon is anything to go by, these debris fields could be very short-lived and difficult to identify.

It looks like a gigantic treasure chest left open among the stars — but instead of gold and jewels, this strange cosmic structure contains dozens of newborn suns. This new image from the James Webb Space Telescope (JWST) reveals the aptly named Treasure Chest, a colorful cloud of gas and dust in the Carina Nebula, one of the Milky Way's richest star-forming regions.

Located about 7,500 light-years away in the Southern Hemisphere constellation Carina, the nebula stretches roughly 260 light-years across and contains some of the most massive stars in our galaxy, as well as tens of thousands of young protostars. It's also home to the "Cosmic Cliffs," which appeared in JWST's first collection of science images, released in 2022.

The Treasure Chest is a cometary globule, an isolated cloud with a dense, dark head and a sweeping tail. Although such objects are named for their resemblance to comets, this one looks more like a wooden chest with its lid propped open and light spilling from inside.

JWST's Near-Infrared Camera reveals the source of that glow: a compact cluster of about 70 young stars embedded in the dust. The most massive one is a rare O-type star — extremely large, bright, and short-lived stars — measuring roughly 19 times as massive as the sun.

Astronomers estimate that the cluster is around 1.3 million years old, although earlier estimates suggested it could be as young as 100,000 years. Many of its stars are still surrounded by the gas and dust from which they were born. Over time, radiation from the cluster's stars will disperse that material, exposing stars that are currently hidden.

The Treasure Chest's unusual shape is also influenced by something outside the JWST image. About 39 light-years away, as measured across the sky, is Eta Carinae, the most luminous object in the Carina Nebula. Eta Carinae famously underwent its "Great Eruption" in the 19th century, when it briefly became one of the brightest stars in Earth's night sky. The system contains at least two stars, including one about 100 times as massive as the sun and roughly 5 million times as luminous. Together with the nearby Trumpler 16 star cluster, its intense radiation and stellar winds are blasting away the Treasure Chest's less-dense gas and helping to sculpt the cloud into its distinctive shape.

The Treasure Chest won't always look like this. Radiation and winds from the young stars inside it, combined with the assault from massive stars nearby, will gradually erode the remaining gas and dust. Eventually, the cosmic chest will disappear, revealing its true jewels — the stars within it.

New Hubble observations have revealed a dramatic, 10-sided jet surrounding Saturn's south pole, and it appears to be evolving before our eyes.

The Hubble Space Telescope recently snapped a high-resolution view of the striking "atmospheric wave," which appears to have begun forming in 2023, archival Hubble images show. Scientists are curious about how this "decagon" popped up so quickly, given that Saturn's other famous multisided wave — a hexagon at the north pole — has been observed on the planet for 40-plus years.

"The question is, why did it suddenly form now when we haven't seen one before?" Amy Simon, a senior scientist at NASA's Goddard Space Flight Center and co-author of a new study describing the observations, said in a statement.

"The northern hexagon has been there every time we've looked for more than 40 years," Simon added. "This feature is different — it appears to be strengthening, giving us the rare opportunity to watch a giant atmospheric pattern develop."

Scientists can see the wave persisting through several atmospheric layers, which means it extends beyond the cloud tops. The wave is also found in a large jet stream at Saturn. More observations with Hubble and the James Webb Space Telescope (JWST) will be required to see how the wave is generated and what the decagon illustrates about atmospheres in large gas giants like Saturn.

The images were obtained as part of Hubble's Outer Planet Atmospheres Legacy program, which uses some of the telescope's time to image the solar system's outer planets — Jupiter, Saturn, Uranus and Neptune — once a year. The goal is to obtain long-term observations of these worlds, to supplement spacecraft orbiting or flying by.

From Earth's perspective, Saturn is slowly orbiting in its roughly 29-year journey of the sun so that its south pole is visible from our planet, allowing for a good view of the changing decagon. Hubble, in fact, was not the first to see signs of this decagonal shape; it was ground-based observatories that spotted a mysterious undulating band around Saturn’s south pole in 2024.

Agustín Sánchez-Lavega, first author of the study and a researcher in the Department of Applied Physics at the University of the Basque Country, and amateur astronomers Trevor Barry and Jean-Paul Oger first spotted the forming wave. The trio used the university's Planetary Virtual Observatory Laboratory, which brings in observations from around the world, to make the Saturnian discovery.

While more images in 2025 showed the wave starting to move into a decagon structure, Hubble was able to obtain high-resolution images without Earth's atmosphere in the way.

The Cassini spacecraft, which orbited Saturn between 2004 and 2017, didn't see the feature, hinting that it hadn’t started forming yet, according to NASA. "Given Saturn's symmetry in its north-south jet stream system, we have been searching for a counterpart to Saturn's northern hexagon on the south pole in Hubble images since 1990," Sánchez-Lavega said.

Both Hubble and JWST are expected to provide more opportunities to look at the ringed planet's developing decagon in the near future. In the meantime, Saturn isn’t the only solar system planet with perplexing polar features; 2017 images from NASA’s Juno spacecraft showed that Jupiter’s south pole is studded with gigantic, oval-shaped cyclones that echo the chaos of the planet’s famous Great Red Spot.

In this single Hubble Space Telescope image, tens of thousands — possibly millions — of stars bound tightly by gravity sparkle as one. This is NGC 6723, a glittering globular cluster about 27,000 light-years away, in the constellation Sagittarius.

Also known as the Chandelier Cluster, this swarm of stars is one of about 150 known globular clusters that orbit in the halo of the Milky Way, though others may remain hidden behind thick cosmic dust or crowded star fields at the galaxy's bright core.

Globular clusters like NGC 6723 are among the most ancient structures in our galaxy. What baffles astronomers most is the age of the stars within them. These clusters often contain stars older than 10 billion years, with some dating back almost to the beginning of the universe itself 13.8 billion years ago. They likely formed early in the history of the Milky Way, billions of years before the thin disk of stars where the sun now orbits took shape.

It was once thought that all stars inside a globular cluster formed at the same time, from the same material, during a single burst of star formation. If that were true, the stars would have the same age and chemical composition.

However, Hubble's view demonstrates that this is not the case. The cluster is densely packed at the center, where many bright-blue stars appear concentrated, while orange stars are more prominent toward the edges. Blue stars are younger than orange stars, suggesting that globular clusters can have complex histories, with different populations of stars and subtle chemical differences among them.

Hubble first observed NGC 6723 in visible and near-infrared light as part of a major survey of 65 globular clusters in 2013. It found that massive stars sink toward the center of a cluster, while lower-mass stars drift outward. In 2013 and 2014, Hubble studied NGC 6723 to search for small chemical differences between stars and to measure the spread of ages of stars within the cluster. Two epochs were found, with the second burst of stars happening about 634 million years after the first.

One leading idea is that globular clusters formed when enormous gas clouds collapsed rapidly in the early universe. However, recent simulations also suggest that some globular clusters may be the surviving cores of ancient dwarf galaxies that were stripped of their outer stars by larger galaxies. Either way, they're a fossil remnant hinting at how galaxies evolve.

Globular clusters are not unique to the Milky Way. They are found around many kinds of galaxies, including spirals, giant ellipticals and dwarfs. The Andromeda galaxy, the nearest large spiral galaxy to the Milky Way, is estimated to host about 460 globular clusters, while the giant elliptical galaxy M87 contains roughly 15,000 globular clusters, according to NASA.

NASA's next-generation cosmic observatory — the Nancy Grace Roman Space Telescope — is set to launch this weekend on a potentially decade-long mission to hunt for distant exoplanets, map out the Milky Way and unravel some of the universe's biggest mysteries, such as the true nature of dark matter.

The Roman telescope and its payload are scheduled to lift off aboard a SpaceX Falcon Heavy rocket Sunday (Aug. 30) at 7:26 a.m. EDT from Launch Complex 39A at NASA's Kennedy Space Center in Florida, according to NASA. A few hours later, the telescope will be released from the rocket's second stage and be exposed to the vacuum of space for the first time.

But even if everything goes according to plan, we will still have to wait a while to get a glimpse of Roman's first groundbreaking images.

As of Thursday morning (Aug. 27), the National Weather Service forecasts a 50% chance of thunderstorms at Kennedy Space Center Sunday, so weather could delay the launch. If that happens, a second launch window is available Monday (Aug. 31) at 7:22 a.m. EDT, when there is a reduced risk of thunderstorms.

You can watch the event on a SpaceX livestream and stay up to date with last-minute developments and postlaunch news via a live blog from Live Science's sister site Space.com.

What is the Roman Space Telescope?

The Roman Space Telescope is NASA's latest flagship observatory. It follows the James Webb Space Telescope (JWST), which launched in 2021, and the Hubble Space Telescope, which has been in orbit since 1990. Rather than replacing those spacecraft, Roman will work alongside them to help scientists scour the skies like never before.

The observatory is named after pioneering scientist Nancy Grace Roman, who served as NASA's first chief astronomer between 1960 and 1979. It is approximately 42 feet (12.7 meters) tall and 14 feet (4.4 m) wide and weighs around 18,000 pounds (8,000 kilograms) — about the same as a fully grown Tyrannosaurus rex, according to a NASA fact sheet.

Roman was fully completed in December 2025, almost a decade after construction began and within its initial $4.3 billion budget (less than half what JWST cost). Since then, it has been moved more than 900 miles (1,450 kilometers) from Goddard Space Flight Center in Maryland and undergone a series of final checks in NASA's "clean rooms." Having initially been slated for a 2027 liftoff, the telescope is technically launching ahead of schedule.

Roman will eventually be stationed around 1 million miles (1.6 million km) from Earth at what scientists call a Lagrange point — a fixed point relative to our planet where the gravity of two objects cancels out. Its specific Lagrange point will be Sun-Earth L2, where JWST and the European Space Agency's Gaia and Euclid space telescopes already reside.

Roman's initial mission will last five years, but experts hope it could survive at least twice that long. Some space telescopes far outlast their initial missions; for example, Hubble is more than two decades past its original mission parameters, and NASA's recently doomed Swift Observatory lasted 10 times longer than predicted.

What makes Roman special?

Roman has two key instruments that set it apart from its predecessors. The first is its Wide Field Instrument, a 288-megapixel camera attached to a 7.9-foot (2.4 meters) mirror, which gives it a field of view 100,000 times greater than Hubble's. It will also see the cosmos in infrared light, similar to JWST. These combined capabilities will allow Roman to observe the cosmos like never before.

But the telescope's secret weapon is arguably its coronagraph, which can block out the light from distant stars, allowing Roman to see fainter objects, such as the exoplanets that orbit these stars. Until now, scientists' main way of finding alien worlds was to wait for them to pass in front of, or transit, their home star, but Roman will be able to directly image exoplanets at almost any time in their orbital cycles. (Exoplanets remain out of view when they are directly behind their home stars.)

One of the biggest and most exciting claims researchers have made about Roman is that it could help reveal up to 100,000 exoplanets. Such discoveries would revolutionize how we study alien worlds, especially considering that we have uncovered over 6,000 exoplanets since the first one was spotted in 1992.

However, the telescope will also conduct long-term surveys that will help astronomers accurately map the Milky Way and find extremely distant galaxies, potentially helping scientists solve the mysteries of dark matter and dark energy that currently underpin a "cosmological crisis" surrounding the universe's expansion. And as with any new space telescope, scientists will likely find novel ways of using Roman once it is in operation.

"The mission will offer practically limitless opportunities for astronomers to conduct a broad range of additional science," NASA representatives wrote in the fact sheet. "From objects in our outer solar system and exploding stars to growing black holes and galaxies by the billions, very little will be beyond Roman's reach."

The spacecraft will beam roughly 1.4 terabytes of data — roughly 10 times the storage capacity of an average smartphone — to ground stations across Earth every day, according to the fact sheet.

When will we see Roman's first photos?

Roman's first snaps are arguably the most anticipated astronomical images since the debut photos from the ground-based Vera C. Rubin Observatory, which were released in June 2025.

But first, Roman has to travel to its Lagrange point, which is roughly four times farther away than the moon. This could take several weeks, although no exact timeline has been provided.

Once Roman is in position, there will be a roughly 90-day commissioning period, during which the telescope will fully power up its instruments and run a series of diagnostic tests to ensure everything is in order before its mission truly begins.

There is, therefore, a slim chance that we could see Rubin's first photos before the end of the year. However, NASA officials have tentatively predicted that the telescope will start snapping the stars in early 2027. It took JWST about seven months postlaunch to send its first full-color image to Earth.

NASA representatives have promised that "data from all of Roman's surveys will be made public as soon as it is processed, with no periods of exclusive access," so once the images are ready, everyone will be able to see them.

SCORESBY SOUND, Greenland ‪—‬ There's no feeling more exhilarating than waking up inside the imminent path of a total solar eclipse to see a clear blue sky. It was Wednesday, Aug. 12, and after over two years of planning, I was in the farthest reaches of eastern Greenland's beautiful Scoresby Sound (or Scoresbysund) fjord system aboard the Aurora Expeditions cruise ship the Sylvia Earle. We were creeping toward Ukattip Kungersiva, also known as Harefjord, in the icy depths of Ofjord.

Up on the observation deck, I scanned the sky for even a slight cloud. There was not a trace. I addressed the planet directly: "Are you kidding me?!" I smiled with utter joy, as it had been 1,210 days since my last clear view of the sun's corona — an eternity for an avid eclipse chaser like me. Clouds had thwarted my previous eclipse chase in Texas for the 2024 total solar eclipse, which was followed by almost two-and-a-half years without a total solar eclipse.

Today, 117 eclipse chasers on the expedition were depending on the decisions made by a few of us on the ship — the ship's captain, the expedition leader (and noted Arctic adventurer) Greg Mortimer and I. We had taken a risk to position the ship in a glorious location — the confluence of four fjord channels, with icebergs passing below ice-capped mountains — and, it seemed, in good weather ‪—‬ and we were also almost bang on the centerline of the path, where the sun would be blocked by the moon for 2 minutes, 16 seconds. That was just two seconds off the maximum possible totality anywhere on Earth. We were asking Mother Nature for everything on offer, but there were zero guarantees, aside from the moon's dark shadow enveloping us and cutting the light.

The day before, we'd surveyed the aptly named Sol Glacier, a wall of ice on the shores of Scoresby Sund. The sound of thousands of tons of ice calving into the sea will stay with me forever, but I had the prospect of something else even more dramatic on my mind. We had to decide where to put the cruise ship for the total solar eclipse the next day. I looked at the latest cloud forecast and sighed; it showed a blue hole of sky far away on Greenland's Blosseville Coast, back the way we'd come from Iceland. Could we make it in time?

Yes, if we left soon. But watching an eclipse far out at sea could bring its own problems. The swell would make the ship unsteady, and mist and clouds were likely. Our first choice, the centerline of the path of totality down narrow Ofjord, had looked cloudy on forecasts all week, though the chances of clear skies had improved slightly today. I headed to the bridge — the ship’s command center — just as the latest forecast was updated. It was good news.

"We're seeing a trend for Ofjord to clear," said Mortimer, who, in addition to being expedition leader, is a mountaineer who's used to shooting for the summit when conditions allowed. To disappear down the channels of Scoresby was a risk; due to narwhals, the speed limit was just 3 knots (about 3.5 mph, or 5.6 km/h) — and there was no escape route. We decided to take the chance.

Being on a cruise ship that could change position paid off in spades. We had hugged the northern side of the fjord to prevent any rising clouds from blocking totality; as it neared, two other cruise ships joined us. The temperature dropped like a stone; three eclipse chasers watching from the ship's open-air hot tubs suddenly appeared to be the most sensible of all.

At precisely 5:33 p.m. on Aug. 12, I watched the sun's bright face finally disappear behind the moon's silhouette as both hung over the reddish rocks of Røde Fjord to the south. The light in Ukattip Kungersiva dissolved as a diamond ring appeared around the moon. As it faded, a luminous reddish-pink prominence — a loop of gas and magnetic fields protruding from the sun's chromosphere — took its place. It was quite possibly the s crispest, clearest and most beautiful totality to witness. The 117 guests stood in reverence throughout as they experienced something unique and impossibly precious.

Each totality is different, but this Arctic eclipse taught me much for the next one on Aug. 2, 2027. For that event, nicknamed the "eclipse of the century," I'll be on the centerline again ‪—‬ but this time, for 6 minutes, 20 seconds. I will witness it from a river cruise ship in Egypt at noon, with the eclipsed sun at 82 degrees — almost directly overhead. So it will be a literal pain in the neck, but worth it.

Should we lie down on the deck? We'll prop up binoculars with our eye sockets and spend six minutes with an all-sky corona. A few lucky observers will get to float in the on-deck pool. It will be scorching hot, but during totality, it will cool considerably. Repositioning likely won't be necessary, as there will be a less-than-1% chance of clouds.

Totality isn't just something you see; it's a landscape you briefly inhabit. In 2027, that landscape — the dark Nile busy with ships and traffic — will last the longest of any total solar eclipse for another 87 years. This time, there will be no risk but plenty of reward.

Opinion on Live Science gives you insight on the most important issues in science that affect you and the world around you today, written by experts and leading scientists in their field.

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A striking red aurora may be visible to some skywatchers alongside tonight's blood-red partial lunar eclipse, astronomers say.

The full moon is expected to slide into Earth's shadow tonight (Aug. 27-28), casting an eerie red glow over 96% of the lunar surface. At the same time, the National Oceanic and Atmospheric Administration (NOAA) has issued a moderate (G2) geomagnetic storm warning for 9:03 p.m. EDT (1303 GMT) Thursday night (Aug. 27) — 20 minutes before the eclipse starts. According to NOAA, the resulting auroras may be visible over several states, ranging from New York to Idaho.

However, skywatchers farther north have better odds of catching both spectacular sights together.

"Though it's unlikely the moon and aurora would occupy the same part of the sky, observers in Canada and Alaska have the best chance to see them together," Tom Kerss, an astronomer and co-author of the "Little Book of Eclipses: An essential companion to solar and lunar events" (Octopus Publishing Group, 2026), told Live Science. "The further west you are, the lower the moon will be in the East during the deepest part of the eclipse, where it may overlap with the brightest region of the auroral oval."

The aurora borealis, also known as the northern lights, is an atmospheric phenomenon caused by the solar wind ‪—‬ clouds of electrically charged particles spewed from the sun. Most of these particles are deflected by the geomagnetic shield that surrounds our planet, but some get swept into Earth's magnetic field and channeled toward the planet's poles.

Once there, the particles collide with atoms and molecules in the atmosphere, causing them to heat up and glow and producing the mesmerizing light show we know as the northern lights.

The intensity of these lights depends on the strength of the solar wind that hits our planet. Yesterday (Aug. 25), a powerful M-class solar flare — the second-strongest class of solar flare — flashed from a restless sunspot called 4513, according to Live Science's sister website Space.com. This was followed by a large ejection of solar plasma known as a coronal mass ejection.

This cloud of electrified, magnetic gas is expected to reach our planet between Aug. 27 and 28, with NOAA forecasting moderate (G1 and G2) geomagnetic storm conditions from 5 p.m. to 11 p.m. EDT on Aug. 27. Meanwhile, the lunar eclipse will begin at 9:23 p.m. EDT, peak just after midnight, and end around 3 a.m. EDT Friday (Aug. 28).

The moon won't fall totally under Earth's shadow, so we can't officially call it a "blood moon," but it will be the deepest lunar eclipse anywhere in the world until the next total lunar eclipse on Dec. 31, 2028. This could allow for particularly unusual viewing conditions.

"Typically, a full moon competes with aurorae by brightening the sky, but when submerged in the Earth's shadow, it will be relatively dark, increasing the odds of spotting the northern lights," Kerss said.

The contrasting green of the auroral bands and coppery-red surface of the moon should make for striking views on their own. But with G2-class geomagnetic storms on the horizon, some viewers may catch a glimpse of an even rarer sight.

"If the northern lights are occurring over your horizon, you may even witness the high-altitude red auroras in concert with a reddened moon," Kerss said.

The colors of the northern lights are influenced by the different gases in Earth's atmosphere — primarily nitrogen and oxygen — and where these gases sit in the atmosphere, according to NASA. At lower altitudes, for example, oxygen usually glows green. However, during more intense geomagnetic storms, an aurora may reach oxygen particles high in our planet's atmosphere. At these altitudes, above 120 miles (200 kilometers), oxygen glows red.

Meanwhile, the moon appears coppery red due to the way Earth's atmosphere bends and absorbs light. Sunlight comprises a spectrum of colors, and the blue and yellow parts of this spectrum are absorbed by the atmosphere. However, red light gets bent, or refracted, by Earth's atmosphere, which directs it toward the moon and lights up our rocky satellite like a blood-red flashlight beam, according to the European Space Agency.

Skywatchers are in for an ecliptic encore tonight (Aug. 27 to 28) as a very deep partial lunar eclipse promises to turn the full moon coppery red.

As the full moon slides into Earth's shadow, it will cast an eerie red glow over 96% of the lunar surface. In North and South America, every stage of the eclipse will be visible in the night sky, beginning at 9:23 p.m. EDT on Thursday night (Aug. 27), ending around 3 a.m. Friday (Aug. 28), and peaking just after midnight. Meanwhile in Europe, the eclipse will occur just before dawn as the moon sinks below the horizon.

The moon won't fall totally under Earth's shadow, so we can't officially call it a "blood moon," but it will be the deepest lunar eclipse anywhere in the world until the next total lunar eclipse on Dec. 31, 2028.

Why does the moon turn red during a lunar eclipse?

A lunar eclipse happens when the moon passes directly behind Earth and falls into its shadow. But instead of going completely dark, the moon turns a deep shade of coppery red. This is because of the way Earth's atmosphere absorbs and bends light.

Sunlight is made up of a spectrum of colors. The blue and yellow parts of this spectrum are absorbed by Earth's atmosphere. But red light is bent, or refracted, by our planet's atmosphere and directed toward the moon, lighting it up like a blood-red flashlight beam, according to the European Space Agency.

The exact shade of red depends on what else is going on in Earth's atmosphere at the time. For example, volcanic ash and desert dust can significantly darken a lunar eclipse.

Unlike with a solar eclipse, you don't need eclipse glasses to safely see a lunar eclipse.

While the partial eclipse will be visible to the naked eye, even better views are possible if you use one of the best telescopes, best smart telescopes or best stargazing binoculars. If you're looking to photograph the moon, check out our picks for the best astrophotography cameras to capture the best shots of the lunar eclipse.

In a scene reminiscent of Vincent van Gogh's "The Starry Night," scientists have captured swirling nebulae, dark dust lanes and sparkling star clusters in remarkable detail.

This spectacular new image from the Dark Energy Camera (DECam) on the National Science Foundation's Victor M. Blanco 4-meter Telescope in Chile shows the Corona Australis Molecular Cloud, one of the closest active star-forming regions to our solar system. It's a place where temperatures fall to around minus 440 degrees Fahrenheit (minus 260 degrees Celsius), allowing dense pockets of gas and dust to collapse and form new stars.

The portrait also combines star-forming regions with an ancient globular cluster far beyond them, all within a single field of view. The 570-megapixel DECam's 74 detectors and 3-foot-wide (1 meter) lens make it one of the world's most powerful wide-field astronomical instruments.

On the left side of the image is the glowing nebula NGC 6729, nestled within the molecular cloud. The blue is a reflection nebula, which is caused by dust reflecting starlight, while the orange shows an emission nebula, which forms when ultraviolet radiation from a young star ionizes gas with its youthful radiation. At the heart of NGC 6729 is R Coronae Australis, a binary star system whose stars complete an orbit of each other every 43 to 47 years.

Glittering like a firework on the upper right is NGC 6723, a globular cluster approximately 29,000 light-years from Earth. Also called the Chandelier Cluster, it contains hundreds of thousands of stars that formed billions of years ago, with some almost as old as the universe itself. However, astronomers suspect that there are several populations of similarly aged stars within the cluster, indicating a complex evolutionary history.NGC 6729 and NGC 6723 are favorite targets for astronomers and astrophotographers because of their relatively close proximity to Earth. However, because they're found below the constellation Sagittarius, they're best seen from the Southern Hemisphere. If you’ve got the right vantage point, a good backyard telescope will help you see this chaotic cradle of star formation.

Astronomers have found the most promising candidate yet for a "black hole star," a new type of astrophysical object lurking in the early universe's "cosmic dawn."

If confirmed, the findings could help to unravel the mysterious origin of "little red dots" (LRDs), an infamous group of hundreds of distant, crimson lights spotted by the James Webb Space Telescope (JWST). These dots, which are almost as old as the universe itself, shine much brighter than stars but are too dim to be fully formed galaxies, making them one of the biggest puzzles in modern astronomy.

The newly discovered dot, which is around the size of our solar system, was spotted by JWST's Miracle or Mirage (MoM) survey, which scours the night sky for far-off galaxies. The reddish light JWST detected was emitted about 660 million years after the Big Bang, when the universe was approximately one-twentieth its current age, and it is roughly 100 billion times brighter than a typical star, researchers reported in a new study, published Aug. 12 in the journal Nature.

The researchers propose that this dot is a black hole star — an enormous, hypothetical ball of dense gas that surrounds and is superheated by a giant black hole. They've named it MoM-BH*-1, combining the survey that found it with the moniker "black hole star one."

"Our picture of this object is evolving very rapidly," study first author Rohan Naidu, an astronomer at the University of Hawaii and a former NASA Hubble fellow at MIT, said in a statement from MIT. It is "truly singular in so many ways," he added.

This is not the first proposed black hole star. Last year, a study that included many of the same authors identified a black hole star candidate dubbed "the Cliff," which displayed many similar characteristics as MoM-BH*-1. However, the team believes the latest find is "our best evidence" of this never-before-seen cosmic object, the researchers said in a separate statement from the Institute of Science and Technology Austria.

MoM-BH*-1 is farther away from us (and therefore older) than the Cliff, making it even more important for understanding how these newly revealed objects form.

Following cosmic clues

The first clue that MoM-BH*-1 was unusual was its striking ruby hue; it is redder than many other LRDs.

"When we see something very red in the universe, we often assume that it is surrounded by dust," study co-author Robert Simcoe, director of MIT's Kavli Institute for Astrophysics and Space Research, said in the MIT statement. Dust blocks out shorter blue wavelengths of light, making the remaining light appear redder, similar to how ash and smoke can make the skies turn orange after a large wildfire, he added.

However, we can be fairly certain that the shining material is not dust because some wavelengths of light are missing from its electromagnetic spectrum. The absence of these wavelengths, known as a Balmer break, suggests that some light particles are being completely blocked. This, in turn, likely means the light is shining through an extremely dense shell of gas, similar to some massive stars, like Vega.

The object is also severely lacking in heavy metals, suggesting that this dense gas is composed almost purely of hydrogen and helium, similar to stars like the sun. However, "the [Balmer] break we observed in this object is the deepest break we have ever observed in any object, ruling out 'ordinary' stars as the source," Naidu said.

To figure out why the gas was acting as if it were part of a massive star, when it clearly was not, the researchers ran multiple simulations, which revealed that the only plausible scenario was that the gas was hiding a hefty black hole.

Normally, black holes suck in all the matter around them via swirling accretion disks. However, particularly large and fast-spinning black holes, known as quasars, can pull in matter so quickly that they also shoot out giant beams of energy. The researchers believe that if such an object were surrounded by a giant cloud of gas, it could not only hold this material in a tight ball but also superheat it, replacing the role of nuclear fusion that occurs at the heart of a typical star.

The team estimates that the black hole lurking within MoM-BH*-1 weighs up to 100,000 solar masses, which is just large enough to qualify as supermassive.

Unmasking the "little red dots"

The central conundrum of the LRD mystery is that these distant dots are too massive to be regular stars and too dim to be galaxies. Quasars — which lie somewhere between stars and galaxies in terms of luminosity — have, therefore, long been touted as potential contenders for these distant objects.

However, until now, scientists could not explain why these objects were not emitting any detectable high-energy radiation (i.e., X-rays and gamma rays), which we see coming from quasars elsewhere in the universe. Black hole stars could solve this issue because their dense gas cocoons could theoretically block out a lot of the high-energy radiation they produce, essentially masking their true identity.

This is not the first time that scientists have suggested black hole stars could be responsible for LRDs. But until now, researchers could not figure out how these objects formed. In addition, many of the LRDs astronomers have spotted are much larger than MoM-BH*-1, and it is unclear how large black hole stars could really be.

Instead, the researchers suspect most LRDs are actually mini-galaxies, each with a black hole star at its core. If so, such configurations likely arose when black hole stars collided with primordial stellar clusters, the team proposed. Images of MoM-BH*-1 suggest that it could collide with such a galaxy in around 100 million years, showing that this idea is possible. (The two objects likely collided long ago, but we have not seen the light of such an interaction yet.)

The researchers noted that MoM-BH*-1 could already be part of a larger galactic structure but is so bright that it is "outshining its surrounding host galaxy, such that we're seeing pure black hole star light," Naidu said.

However, much more research is needed before scientists can confidently claim that all LRDs are tied to black hole stars.

Astronomers have discovered the closest, fastest star ever seen orbiting Sagittarius A* (Sgr A*), the 4.3 million-solar-mass black hole at the heart of our galaxy. The faint star, named S301, completes a lap every 8.7 years and skims past the black hole at roughly 55 million mph (90 million km/h) — about 8% the speed of light. Its orbit is so tight that, within about a decade, researchers should be able to measure its spin rate. The discovery was reported Aug. 19 in the journal Nature.

Stars as lanterns in warped space

The center of the Milky Way, some 27,000 light-years away, is one of the best natural laboratories physicists have. A few dozen stars swarm the galaxy's central black hole on tight orbits, and because gravity there is far stronger than anywhere else we can watch closely, those stars behave in ways Isaac Newton never anticipated.

"Stars orbiting Sgr A* are very interesting objects, as they serve as luminous probes of the curved spacetime around the black hole," study co-author Felix Mang, a doctoral student at the Max Planck Institute for Extraterrestrial Physics in Germany, told Live Science via email.

Until now, the star doing most of that work was S2, a bright star on a 16-year orbit. Astronomers have followed S2 since 1992, through more than two full laps, and that tracking revealed two hallmark predictions of Einstein's theory of general relativity: light from the star losing energy as it climbs out of the black hole's gravity well, and the slow rotation of its elliptical orbit, known as Schwarzschild precession.

Those effects depend only on the black hole's mass. But black holes have a second property: rotation. A spinning black hole drags the fabric of space around with it, like a spoon stirring honey. That effect fades extremely quickly with distance, so measuring rotation requires a star that dives much closer to the black hole than S2 ever does.

Measurements of black holes' rotations also matter beyond black hole physics. One leading alternative to general relativity "postulates the existence of a fundamental fifth force that arises, for example, from unifying gravity and quantum physics," Mang said.

Any deviation from Einstein's predictions should show up in these stellar orbits. So far, he said, "only an upper limit could be derived, which gets progressively lower" — in other words, there are no cracks in Einstein's theory yet, but the tests keep tightening.

A record-breaking orbit

That is where S301 comes in. In images captured by the GRAVITY instrument on the European Southern Observatory's Very Large Telescope in Chile, the astronomers "discovered a new, very faint star in the Galactic Center that is orbiting the central massive black hole Sgr A* so closely that its orbit is sensitive to the spin of the black hole," Mang said.

The star first showed up in spring 2023 as a faint smudge northwest of the black hole. Once the team had a rough orbit, they went back through archival observations and found it again in data from 2021 and 2017. In total, 19 measured positions spanning eight years trace out a complete, closed ellipse in the sky.

The orbit is extreme by every measure. S301 takes 8.7 years to orbit the black hole, beating the previous record holder — a star on a 12-year orbit — and S301's path is stretched into a needle-thin ellipse. At its closest approach, it passes within about 12 astronomical units from the black hole ‪—‬ 12 times the distance between Earth and the sun ‪—‬ and around 10 times closer than S2 ever gets.

Even at that distance, S301 is safe. It appears to be an ordinary main-sequence star of about 1.5 solar masses — compact enough that the black hole's tides cannot tear it apart. Its wildly elongated orbit suggests a violent origin; the team proposed that S301 was probably once half of a tight double star that strayed too close, was ripped in two, and had its partner flung out of the galaxy as a hypervelocity star.

The tight orbit is already showing relativity at work. "We found that the orbit of S301 succumbs to strong general relativistic effects, as the so-called Schwarzschild precession — the turning of the orbital ellipse within its own plane — is very apparent," Mang said. The ellipse swings around by about 2 degrees every lap. "Within the next ten years," he added, "a measurement of the spin of Sgr A* with S301 is within reach."

The hard part, and what comes next

Finding S301 was itself a feat. From Earth, the star appears about 2 billion times fainter than Betelgeuse ‪—‬ one of the brightest stars in our sky — and it sits in a crowded field beside far brighter neighbors, making it the observational equivalent of picking out a single fly buzzing over a full orchestra. It took a new image-reconstruction method, plus GRAVITY's recent upgrade to GRAVITY+, which boosted its sensitivity by a factor of 10 to 100, to pull the signal out.

One piece is still missing: The team can see how S301 moves across the sky, but not toward or away from us, which leaves two mirror-image orbits equally consistent with the data.

Now, they plan to fill in that gap. "We will keep following S301 closely along its orbit," Mang said, both with GRAVITY and an upcoming instrument that measures how light from the star shifts toward the red or blue end of the spectrum as it moves away from or closer to Earth.

Simulations by the team suggest that a decade of such combined observations could pin down the black hole's spin well enough to distinguish a rapidly rotating black hole from a stationary one with high confidence. Statistically, S301 should not be alone; roughly 100 similar stars may lurk on comparable orbits, but most of them are too faint to be seen today.

See how much you know about black holes with our black hole quiz!

NASA has finally revealed its first images of the crater made by a SpaceX Falcon 9 upper stage that smashed into the moon on Aug. 5.

The images, captured by the space agency's Lunar Reconnaissance Orbiter (LRO) between Aug. 11 and 12, show a 60-foot-wide (18 meters) crater surrounded by streaks of lunar rock thrown up by the rocket's impact.

The new crater was carved into the lunar surface by the upper stage of one of SpaceX's Falcon 9 rockets, which launched on Jan. 15, 2025 to deliver a pair of lunar landers to the moon. Unlike Falcon 9's lower stage, which can return to Earth to be reused, the rocket's upper stage is discarded in orbit. In this case, after drifting around our planet for nearly a year, a combination of solar radiation and the moon's gravitational pull nudged the 4.4-ton (4 metric tons) rocket section away from Earth and toward our rocky satellite, according to Live Science's sister site Space.com.

Finding the impact site was a challenge that required global cooperation between hobbyists and experts, NASA said in a statement on Tuesday (Aug. 18). The crash occurred near Einstein crater on the northwestern limb of the moon, which was facing the sun at the time of the collision. As a result, the initial flare from the crash was not visible from Earth.

The speed of the collision further complicated the hunt: The rocket stage hit the surface at an estimated 5,400 mph (8,700 km/h). While this may sound fast, it's still a lot slower than the average speed of meteoroids that crash into the moon, which NASA say is anywhere between 45,000 mph (72,420 km/h) and 160,000 mph (257,495 km/h). As a result, the impact was relatively small and therefore even harder to see from Earth.

The crash was first predicted by independent astronomer Bill Gray in May. According to NASA, the agency's Center for Near Earth Object Studies then refined these initial predictions to more precisely estimate the location of the impact site.

The first spacecraft to come within range of the site was South Korea's Danuri lunar orbiter, which revealed the first images of the small, blackened crater on Aug. 6. NASA's LRO photographed the same spot six days later.

"The orbiter circles the Moon from pole to pole every two hours, while the Moon slowly rotates underneath it," the space agency said in the statement. "To photograph a specific spot, the spacecraft must wait until that location turns into view."

Using its Narrow-Angle Camera, the LRO was able to snap the crater from several different viewing angles, which enabled scientists to estimate the crater's size as roughly 60 feet wide (18 m) and less than 10 feet (3 m) deep.

The images also show light and dark streaks radiating from the crater, which NASA says are lines of dust and rocks thrown up from the lunar surface during the impact. The darker streaks are made by weathered material from near the surface, while the lighter streaks near the rim are made up of older rocks from deeper underground.

This mesmerizing image may look pretty, but it captures a hostile environment: the turbulent region surrounding a dying star close to our galaxy's central black hole.

This unprecedented view of the star IRS 3 (located near the center of the image) shows that it is shedding an enormous amount of material, gas and dust to build a sprawling envelope around itself. Within that star's envelope, scientists detected traces of water.

Although astronomers have detected water near other stars before, this is the first time it's been found this close to the Milky Way's supermassive black hole, known as Sagittarius A*.

The observations, described Aug. 11 in the journal Astronomy & Astrophysics, show that even in the harsh conditions surrounding a galaxy's central region, aging stars like IRS 3 may still be quietly seeding their surroundings with dust. That‬ challenges the assumption that galactic centers are too extreme for this process to happen at all.

"The detection of water is especially exciting because it shows that molecular material can survive in an environment dominated by intense radiation," study co-author Macarena Garcia Marin, a researcher at the European Space Agency, said in a statement.

How the image was captured

The magical view was pieced together by combining data from the James Webb Space Telescope's (JWST) Near-Infrared Camera and Mid-infrared Instrument.

"This is the first time a continuous mid-infrared spectrum has been collected for this star, allowing us to detect the features from the silicate dust and uncover the star's true chemical identity," said Garcia Marin, who is also the principal investigator of the Mid-Infrared Characterization of Nearby Iconic galaxy Centers (MICONIC) program.

Another image shows where this star is located relative to Sagittarius A*: 0.55 light-years away.

IRS 3 is no ordinary star — it belongs to a class of aging stars living in what astronomers call the asymptotic giant branch phase. In this late-life stage, stars are large and have relatively cool temperatures, and high luminosity. They blow off layers of their own material through intense stellar winds, and that castoff material seeds the universe with cosmic dust.

But given how closely IRS 3 sits next to Sagittarius A*, it wasn't clear whether it could still generate these winds and produce dust. The new study provides a much clearer picture.

To map the structure of the star's envelope, the team combined JWST's spectral data with models simulating how the starlight would travel through different possible dust configurations around the star. The best fit turned out to be a layered, shell-like structure of dust stretching roughly 10,000 astronomical units outward from IRS 3, with temperatures ranging from around 1,200 kelvins (1,700 degrees Fahrenheit, or 927 degrees Celsius) near the star down to about 100 kelvins (minus 280 F or minus 173 C) at the envelope's outer edge.

Digging into the mid-infrared data, the team found clear signs of oxygen-rich dust surrounding IRS 3. This finding overturns an earlier result that had classified IRS 3 as carbon-rich based on the shape of its dust envelope. Instead, the analysis revealed two strong infrared signatures of silicate dust composed of silicon and oxygen — a telltale signature of an oxygen-rich chemistry.

More intriguingly, within the envelope, they also detected traces of water, despite the star's proximity to the harsh radiation environment near a supermassive black hole. Combining the spectral data with stellar models, the team estimates that IRS 3's mass is roughly six times the sun's mass and its age is around 72 million years. The star has a luminosity of roughly 60,000 times that of the sun.

See how much you know about black holes with our black hole quiz!

Astronomers have discovered a close pair of actively feeding supermassive black holes, seen when the universe was just 1.3 billion years old. Collectively known as LID-1166, the two monsters are separated by only about 4,900 light-years (1.5 kiloparsecs) inside a merging galaxy, offering the first clear view of a phase that's critical for understanding the growth of supermassive black holes.

Most large galaxies we can see formed over billions of years by merging with other galaxies. Most galaxies also have central black holes, so a merger between them would produce a system with two black holes. These "dual black hole" systems are thought to be common in the early universe. However, given that they're buried in dense gas and dust, these black holes are too close to be observed separately.

In a new study uploaded to the arXiv preprint server July 21, Hyewon Suh, an astronomer at the International Gemini Observatory/NSF NOIRLab, and colleagues reported the discovery of the closest-together dual black hole system ever confirmed this early in the universe's history. The team used the James Webb Space Telescope (JWST) and the Atacama Large Millimeter/submillimeter Array (ALMA), a collection of radio telescopes in Chile, to study this system. The paper has been accepted for publication in the journal Nature Astronomy.

"What makes that discovery special is that we may be seeing these two black holes growing and interacting in a system that is only about 1.3 billion years after the Big Bang," Anna Trindade Falcão, an astrophysicist at NASA's Goddard Space Flight Center who was not involved in the study, told Live Science.

A distant "close" pair

LID-1166 first caught the astronomers' eyes as an X-ray source in the Chandra COSMOS Legacy Survey, but it remained completely undetected in even the deepest Hubble Space Telescope images. The strong X-ray signal hinted at the powerful feeding activity.

To understand what was producing these strong emissions, the team turned to JWST's Near-Infrared Spectograph (NIRSpec) instrument, which revealed two compact, glowing sources sitting 4,900 light years apart. Although astronomers have spotted other dual black hole candidates even earlier in the history of the cosmos, those pairs were separated by tens of thousands of light-years or more. LID-1166 is the first confirmed case of two black holes existing this close together.

"This step of the discovery could happen only thanks to the exquisite imaging and spectroscopic capabilities of the JWST, and in particular its instrument NIRSpec," study co-author Roberto Decarli, an astronomer at the Italian National Institute for Astrophysics in Bologna, told Live Science in an email. "Similar observations from the ground would be extremely challenging due to the poor transparency of the atmosphere at these wavelengths."

"Meaningful evidence"

Both objects showed spectral signatures of gas swirling at high speeds indicative of actively feeding black holes, also known as active galactic nuclei, powering the merging system. Trindade Falcão said the researchers tested several methods for subtracting the main galaxy's light, and the signal at the second object's position stayed there every time, which is "meaningful evidence" that the signal is real

Even so, she says it would be worth double-checking, with a more detailed follow-up analysis, that the data truly shows two separate black holes — rather than one black hole plus some leftover glow being mistaken for a second one.

Using ALMA data, the team also detected a large pool of cold gas associated with each AGN, which Decarli said "points to the two AGN residing in the center of two galaxies on the verge of merging."

The presence of the galactic environment around each black hole helped the team rule out other exotic scenarios of how this system formed. For example, if one of the black holes were kicked out of its home galaxy in the process of merging, or flung out through a chaotic three-way gravitational interaction, the black hole would be moving fast, without any gas around it. It would show up as a "naked" black hole stripped of its surroundings. But that's not what the observations showed.

Monstrous growth

This discovery could also help astronomers understand one of the biggest puzzles in astronomy: how some supermassive black holes grew so quickly in the early universe. Models that explain this rapid growth rely on the same idea that gas rushes in from around the galaxy and gets funneled down to the center, feeding the black hole, Decarli explained.

"Cannibalizing other galaxies is part of this process," he said. "But what if these galaxies also host a massive black hole at their center?" Studying systems like LID-1166 "will help us shed light on how the growth of these galaxies and black holes will take place," he added.

The basic idea that early galaxies merge and drag their black holes together isn't surprising on its own, as it's something theory has predicted for years, Trindade Falcão noted. "What is striking here is resolving this process in an obscured pair that is only 1.5 kiloparsecs apart," she said, and this is the first step toward uncovering a hidden population of black holes that, in theory, we know should exist.

See how much you know about black holes with our black hole quiz!

An unassuming, brownish stone may be one of the most precious objects on Earth. The rare rock, called Teghaza 001, is a piece of ancient Mars and gives geoscientists an invaluable opportunity to study the planet's oldest material.

Now, a slew of recent studies based on evidence from the space rock are helping scientists understand more about the Red Planet's history of habitability.

Scientists believe that Earth and Mars coalesced around 4.5 billion years ago from the protoplanetary disk of gas and dust that surrounded our young sun. These two celestial siblings have since shared more than a few rocks in the intervening millions of millennia. Meteoroid impacts frequently gouge the Martian crust and have sent several hundred pieces of Mars hurtling to Earth — a free Mars return mission, paid for by the universe.

Two especially famous specimens include the Allan Hills 84001 meteorite, which contains tantalizing 4 billion-year-old organic molecules; and NWA 7034, a meteorite with 4.4 billion-year components and specks of ancient water.

But these Martian meteorites are lacking in a couple of respects. The former lacks mineral variety, and the latter appears to be a meteoritic mosaic that solidified from much older individual components, so neither faithfully represents some of Mars' oldest crust.

Teghaza 001, however, may help fill that knowledge gap.

Martian history right in our hands

The Teghaza 001 meteorite comprises 28 ounces (800 grams) of Martian material, split into eight pieces recovered in 2022 near the Taghaza archaeological area in Mali. It's owned by the Maine Mineral and Gem Museum.

In a preprint uploaded April 14, which has not yet been peer-reviewed, researchers measured the rate of multiple types of radioactive decay in different minerals, including tiny crystals called zircons, which are embedded within Teghaza 001, and found that the multiple measures agreed on an age at least 4.1 billion years ago. This may make the space rock the single oldest-known piece of Mars.

The space rock is rich in silica, suggesting that Mars may have been producing its own version of granite, which on Earth requires forces associated with plate tectonics. Granite must melt in extremely hot, pressurized subterranean conditions and then cool slowly, becoming lighter and eventually bubbling up through the ground to form the core of continents and the hearts of mountains.

But Mars has no tectonic plates, and its surface seems to be made of basalt, the dark, heavy volcanic rock that forms from quick-cooling lava — and also the stuff that makes the Hawaiian islands.

Are plate tectonics really necessary?

In a paper published June 26 in the journal Nature Astronomy, researchers revealed evidence that Mars may have been able to drive the geological processes that are mediated by plate tectonics on Earth.

The researchers used seismic data from NASA's InSight lander to model Mars' interior, and found evidence that it once housed huge, interconnected magma networks that may have stretched thousands of miles beneath its northern hemisphere.

"One of the big questions in planetary science is whether Earth is unique," study co-author Jon Wade, an associate professor of planetary materials at Oxford University, said in a statement.

"If Mars could develop this kind of complex crust without plate tectonics, then maybe the conditions needed for habitability can emerge on more planets than we realised, including those previously dismissed based on size or their apparent lack of tectonic activity," Wade added.

As a result, such processes may have helped early Mars develop an atmosphere, large bodies of water and potentially habitable conditions — a scenario that may be playing out elsewhere across the universe.

The solar system gives, and the solar system takes

While this may sound encouraging for the emergence of Martian life, Teghaza 001 also offered evidence that Mars began losing its water early in its history.

In a separate paper published June 10 in the journal Science Advances, researchers recreated Mars' hydrological evolution by tracing its hydrogen, a major constituent of water, by chemically analyzing a piece of Teghaza 001 and comparing it with two younger Martian meteorites.

To explore when Mars' water began seeping into space, the researchers examined the meteorites’ ratios of hydrogen to deuterium, a heavier version of hydrogen that contains a neutron in addition to the one proton and one electron that make up basic hydrogen atoms.

Because hydrogen is lighter, it more readily escapes into space, leaving behind a greater abundance of deuterium. The results "indicate that Mars lost a substantial proportion of its juvenile atmosphere to space within a few hundred million years after the magma ocean solidified," the researchers wrote in the study.

Importantly, this suggested that Mars was already rapidly losing its hydrogen into space by 4.1 billion years ago.

While Teghaza opens a rare window onto Mars’ earliest epochs, scientists urge that more samples are needed to truly understand Martian history. James Day, a professor of geosciences at the Scripps Institution of Oceanography at the University of California San Diego, who was not involved in this research, noted that this finding is drawn from a small, rare piece of evidence. "I would caution that all of these arguments would have been based on a single small stone," he told Live Science in an email.

What do you know about the Red Planet? Test your knowledge with our Mars quiz!

The first photos from yesterday's total solar eclipse are here, and they're spectacular.

Captured Wednesday (Aug. 12) by NASA scientists during a special eclipse livestream from Spain, the images show the moon completely blocking the visible surface of the sun, plunging the daytime sky into twilight for roughly 90 seconds and allowing our star's elusive corona (its wispy outer atmosphere) to shine through.

In this incredible image taken with a solar-filtered telescope, the moon appears as a black circle, cloaking the sun. The white spikes of light encircling the moon are the corona, a mysterious part of the sun that is rarely visible to the naked eye. (Why is it so mysterious? For one thing, the corona is millions of degrees hotter than the sun's surface, and scientists aren't sure why.)

On the left side of the image, a bright-pink blob shoots off of the solar surface. This is not a solar flare, but a prominence — a towering structure of plasma held in place above the sun by powerful magnetic fields. Prominences often measure many times taller than Earth is wide, making them clearly visible from 93 million miles (150 million kilometers) away.

Another image, taken just before totality, shows "Baily's Beads" shining in the small gap between the sun and the moon. This effect occurs when the last vestiges of sunlight shine through the uneven mountains on the moon, creating a bright and bumpy spectacle.

Yesterday's eclipse followed a narrow path of totality — the path of the moon's dark inner shadow cast on Earth — from near the North Pole to Greenland, western Iceland and northern Spain. Viewers outside the path of totality were treated to a partial eclipse of up to 90% coverage in Europe and a much humbler 10% to 25% coverage in the northeastern U.S. and Canada.

Here's how you guys watched the eclipse around the world:

The sky show will keep going tonight as the Perseid meteor shower continues to grace our skies after peaking yesterday. The skies will still be especially dark after last night's new moon, so you'll be able to see these shooting stars in all their splendor. More eclipses are also on the way, with the first coming in just two weeks.

As is always the case, today's solar eclipse will be paired with a lunar eclipse. Two weeks from now, on Aug. 27-28, a deep partial lunar eclipse will be visible across most of North and South America starting around midnight EDT. Almost completely engulfed in Earth's shadow, the moon will take on a faint reddish hue.

Then, next year, the longest total solar eclipse of the century will be visible from southern Spain and northern Africa. Mark your calendars for Aug. 2, 2027. This is one solar spectacle you won't want to miss.

For space fans and skywatchers, Wednesday, Aug. 12 is destined to be a date for the history books. Viewers in North America — including Alaska, eastern Canada and parts of the northeastern U.S. — will be able to see a partial solar eclipse during the daytime.

Across the pond, a total solar eclipse will be visible from eastern Greenland, western Iceland and northern Spain. (If you're planning to see this rare event in person, it's important to wear certified solar eclipse glasses during the partial phases of the eclipse ‪—‬ which means throughout the entire eclipse for everyone in North America. We have some solar eclipse gear suggestions that can help you watch this skywatching event from anywhere.)

Once the sun goes down, the night sky will offer its own treat: the Perseid meteor shower, which peaks overnight on Aug. 12-13. Thanks to a new moon, stargazers will have an even better chance of catching these lights streaking across the night sky, with the best hours to watch occurring from midnight to 2 a.m. local time. According to The Planetary Society, observers in dark-sky areas can hope to catch between 50 and 75 meteors per hour. The dark skies also make it a great night to try observing the Milky Way or the six planets that will appear together before dawn.

In a Live Science poll, we asked our readers whether they would be observing today's solar eclipse or tonight's Perseid meteor shower.

More than 240 readers responded to the poll, which was published Aug. 10. At the time of writing, the results showed that 51% of respondents will be watching both events, with 21% interested only in the Perseid meteor shower. About 20% of readers noted that they're not in a great place to watch the solar eclipse, with one commenter noting, "I'm in Georgia, not a viewing area, but I'll be looking online!" (Space agencies NASA and ESA will both be offering live streams of the eclipse from Spain, starting around 1 p.m. EDT).

What was perhaps the most surprising is that 2% of readers admitted they will not be watching either event but will instead stay inside and “scroll on Instagram.”

But some of those who are planning on witnessing these rare phenomena are making it an experience to remember. One commenter mentioned, "My brother is heading to Spain for the eclipse, meeting with a group of surfers, they'll surf into the eclipse."

Will you be enjoying today's skywatching events? Let us know in the comments below.

Though the spectacular sight of a total solar eclipse feels like a rare experience, on a planetary scale, the average time between two such events is just 18 months, with some occurring much closer together. Now, thanks to centuries of studying the orbit of the sun and moon, we are able to correctly predict when and where the next eclipse will be far into the future. But for thousands of years of human culture, the lunar crossing of the sun remained as mysterious in cause as it did in location.

In his book "Solar Eclipses" (Reaktion books, 2026), writer and historian of astronomy William Sheehan goes back to ancient times to discover what impact this awe-inspiring celestial dance between the sun and the moon had on ancient civilizations, and how over time we began to understand the science choreographing it.

This excerpt from the book goes as far back as ancient Greece, where we learn of the "immoral, foul-mouthed and violent" soldier and poet Archilochus, who gave us the first written account of a total solar eclipse.

Today, with the ability to predict the paths of eclipses to extremely high accuracy, to make quite successful long-range (ten days or more) weather forecasts, ease of travel and for many, plus a significant amount of discretionary income that never existed in previous times, seeing eclipses has become a passion for thousands of global eclipse-chasers. People seek out a connection with the larger universe that includes a huge rush of adrenaline and life-transforming emotions that have been described as "spiritual" in nature. Of course, eclipses have occurred since time immemorial, but until recent times people have experienced them on a somewhat haphazard basis. This is emphatically the case with total solar eclipses, which, despite being the most stunning, are rare from any given place and could hardly be expected (before eclipse prediction and travel became more convenient) to be seen in a human lifetime.

The reason for this is that the central (umbral) shadow of the Moon that creates the totality zone is so narrow —– only 200 kilometres (124 miles.) on average —– so that it mostly falls on uninhabited portions of Earth's surface. From any one location, totality might not occur at all during a person's lifetime. The 30 June 1954 total eclipse, for instance, was the last visible from Minneapolis until that of 14 September 2099; the 22 July 2028 eclipse visible from Sydney will be the last visible from there until 3 June 2858 (!) and so on.

The actual width of the direct path of the shadow (known as the antumbra at annular and umbra at total eclipses) can vary from 0 kilometres to more than 1,000 kilometres (620 miles). It reaches the latter figure if it strikes Earth obliquely as it did, for example, during the annular eclipse of 12 September 489 B.C.E. (which occurred, incidentally, a year to the day after the usually accepted date of the Battle of Marathon, in which the Greeks defeated the Persians); the antumbral width was then 1,132 kilometres (703 miles).

Even to be aware of the partial phases of a solar eclipse is difficult unless the eclipse is very deep — marked changes in the intensity of sunlight occur only minutes before totality. And in general, people working in fields or hunting and fishing have little incentive to stare at the Sun. Thus, for untold ages, partial solar eclipses must largely have been simply missed. Lunar eclipses, on the other hand, are much more frequent from any one location, since a total lunar eclipse is visible anywhere within the night hemisphere of Earth. Lunar eclipses are also highly impressive, involving as they do the Moon's light being encroached upon and swallowed in shadow as well as the colour of the Moon turning to blood red.

That having been said, even without being able to make specific predictions, people from earliest times certainly took a keen interest in the vast pageant taking place overhead — Sun, Moon and stars, as well as clouds and other meteorological phenomena. The universe seems replete with powers more than human, powers mysterious and largely beyond our ken. The sense of this underlies the origin of religion, which in the first instance may have consisted in the apprehension of "something, indicated by terms such as the holy, the numinous, or the sacred … transcendent and irreducible." Our first response to the strange universe around us is deep, primal, pre-verbal.

Until the second century B.C.E. (and then first in Babylonia after millennia of recording celestial phenomena and their associated omens), it was impossible to predict with any accuracy when a total solar eclipse would occur. The best one could do was to suggest that on such and such a date it was somewhat probable that an eclipse might occur, though whether partial or total — or no eclipse at all — could not be determined. Thus any supposed prediction of an eclipse would have been a matter of sheer luck. No one yet had a clear idea of what caused an eclipse. Moreover, at a time when the Sun and Moon were regarded as gods, who could possibly know the minds of deities, or set limits to their arbitrary sway?

Even in modern times, an eclipse, for which the circumstances have been predicted fully and in detail, elicits an overpowering emotional response. What kind of response would a completely unexpected event have elicited?

We are lucky to have one very vivid first-hand account from an eyewitness of such an event. He was the Greek soldier and poet Archilochus, who lived on the island of Paros during the seventh century B.C.E., a century or so after Homer and Hesiod. Much of what we know about him (or think we know) is based on what he recorded in his poems. Thus without his poems, "we would never have found out that his mother Enipo was a slave … nor that he was an adulterer, that he was licentious and violent, and, most disgraceful of all, that he threw away his shield [during a battle]."

For all that, Archilochus' poems don't show him in a very flattering light. He appears to have been immoral, foul-mouthed and violent. It was said that after his engagement to one Neobule was broken off by her father, he wrote a series of songs so scurrilous (only fragments remain) that Neobule herself, the father and her younger sister all hanged themselves for shame. Throwing away his shield was even worse, by the standards of the time, than his lewd remarks towards women — it was the ultimate faux pas for a member of the warrior class of seventh century B.C.E.. He justified doing so on the grounds, already a cliché at the time, that it allowed him to fight another day. And so he did, being killed in a battle between Paros and Naxos by a Naxian warrior named Calondas, at the age of 35.

All very interesting, but the only reason that Archilochus is mentioned here is because he is something of a hero to eclipse watchers, because of a chance event that occurred on 6 April 648 B.C.E.. On that date (as determined from modern eclipse calculations) a total eclipse occurred; the Moon, like a shield thrown away in battle, covered the Sun. The path of totality began in the Atlantic off the western coast of Africa, ran just south of the boot of Italy, crossed Greece and the Black Sea, then veered north across Siberia. We can’t be exactly sure of Archilochus' location; it might well have been in Paros itself, which was exactly on the centre line (where the duration was some five minutes). Nevertheless, we do know exactly what he thought and how he felt:

Nothing is surprising anymore, nothing is deniable on oath;

No longer will anything seem impossible or marvellous, since

Zeus, father of the Olympians, has turned midday into night,

veiling the radiance of the sun, and turning mankind slack

with fear.

Hereafter all things become credible, they are to be expected,

There is no longer any reason for amazement, even if you see

The wild beasts changing places with dolphins,

making the oceans their pasture, and taking joy

in the sonorous murmur of the sounding sea,

while the dolphins, for their part, think better of the wooded

mountain.

(Translated by Michael Armstrong)

Archilochus achieved immortality with this poem: he became the first person we know of by name to have seen a total eclipse of the Sun, and to have recorded his stunned reaction.

Excerpted from "Solar Eclipses" (Reaktion books, 2026) by William Sheehan.

The largest 2D map of the universe just dropped, and it’s a stunner. Compiled from more than a decade of observations, the new map charts 4 billion stars, galaxies, black holes, asteroids and other objects of interest throughout the cosmos.

The map reveals about three-quarters of the night sky in high resolution, spanning both visible and near-infrared light wavelengths and charting the areas of the universe not blocked by dust or gas. The map is so big, in fact, that it’s impossible to reproduce as a single image here; instead, astronomers invite you to explore their vision of the universe using the free Legacy Survey Sky Browser webpage.

It took 13 years and three ground-based sky surveys, using telescopes from the National Science Foundation (NSF) and the University of Arizona to gather the information for the map. The results are available for other scientific investigators to use and will likely help other telescopes to search the cosmos.

"Astronomers and citizen scientists can combine the map with their own observations to better understand our universe," NSF officials from NOIRLab said in a statement Aug. 10.

"Researchers can search for rare phenomena like gravitational lenses, observe fleeting events like supernovae, and investigate two of physics' biggest mysteries: dark matter, the invisible substance that accounts for most of the mass in our universe, and dark energy, the force driving our universe's accelerating expansion," the statement added.

Past versions of the map have generated at least 1,800 science papers, according to the statement. The latest map is expected to inform newer observing projects, such as the Vera C. Rubin Observatory and the Nancy Grace Roman Space Telescope. Additionally, these maps laid the groundwork for the Dark Energy Spectroscopic Instrument (DESI) survey, which is creating a 3D map of the cosmos by measuring the light of celestial objects to figure out their distances.

DESI's first five-year survey wrapped up in April, and the early results suggest dark energy may be getting weaker with time. As physicists grapple with the implications, including how the universe may end, more data from DESI is coming shortly, with improved results from the first five years expected next year. DESI's work will continue into 2028, so even more is to come.

The three telescopes behind the map are The Dark Energy Camera, mounted on the NSF’s Victor M. Blanco 4-meter Telescope in Chile, the NSF Nicholas U. Mayall 4-meter Telescope at Kitt Peak National Observatory in Arizona, and the UA Bok 2.3-meter Telescope, also at Kitt Peak. The observations were supplemented by years of data from NASA’s Wide-field Infrared Survey Explorer (WISE) satellite mission.

The eclipse has begun! Today (Aug. 12), the new moon swoops in front of the sun, casting its dark shadow across a stretch of Earth from Iceland and Greenland to northern Spain. Viewers in the path of the shadow, known as the path of totality, will see a stunning total solar eclipse.

Meanwhile, millions of skywatchers in North America and Europe will be treated to a partial eclipse, with the moon covering more than 90% of the sun's visible surface in some areas.

NASA is live-streaming the entire event from Iceland and Spain. Their stream begins at 1:15 p.m. EDT, and you can watch it right here:

Want an alternate view? ESA is also streaming the eclipse from the Astrophysical Observatory of Javalambre in Teruel, Spain. CNN will also stream totality from Spain, starting at 1 p.m. EDT Wednesday.

Want to know more about the Aug. 12 eclipse? Live Science has all the details below.

Where is the Aug. 12 total solar eclipse visible?

The path of totality for the Aug. 12 eclipse runs in a perplexing arc from far northern Siberia near the North Pole down to Greenland, western Iceland and, finally, southern Spain. Prime locations to catch the total phase of the eclipse include Scoresby Sund, Greenland; Reykjavik, Iceland; and León, Spain.

Here's when totality will occur in various locations, and for how long:

• Scoresby Sund, Greenland: 4:35 p.m. WGST (up to 2 minutes, 17 seconds)
• Reykjavik, Iceland: 5:48 p.m. GMT (60 seconds)
• León, Spain: 8:28 p.m. CEST (1 minute, 45 seconds)
• Soria, Spain: 8:29 p.m. CEST (1 minute, 43 seconds)
• S'Arenal, Mallorca, Spain: 8:31 p.m. CEST (1 minute, 36 seconds)

Totality is the only time when it's safe to view the eclipse without a pair of certified solar eclipse glasses, which you can still buy online. Protective eyewear must be worn at all times during the partial phases of the eclipse — meaning everyone outside the path of totality must wear their glasses at all times while viewing.

You can also use a pair of binoculars or a telescope with a solar filter to enjoy the partial phases safely.

Where is the Aug. 12 partial eclipse visible?

Skywatchers in North America won't have the best view of this eclipse, but some cities in the Northeast will have a chance to bust out their eclipse glasses and see the moon blocking part of the sun in the afternoon.

Here are the best places to catch the partial eclipse from North America:

• Iqaluit, Nunavut: 1:24 p.m. EDT (61% eclipse)
• St. John's, Newfoundland and Labrador: 3:00 p.m. NDT (53%)
• Fairbanks, Alaska: 8:27 a.m. AKDT (37%)
• Anchorage, Alaska: 8:21 a.m. AKDT (28%)
• Quebec City: 1:46 p.m. EDT (24%)
• Bangor, Maine: 1:53 p.m. EDT (23%)
• Montreal: 1:45 p.m. EDT (18%)
• Boston: 1:55 p.m. EDT (16%)
• New York: 1:54 p.m. EDT (9%)

Viewers in Europe will experience a much more complete eclipse, with the sky dimming somewhat and the air feeling a bit cooler than normal. However, eclipse glasses must still be worn at all times, even in places seeing a 99% eclipse. These are the best spots to see the partial eclipse in Europe:

• Madrid: 8:32 p.m. CEST (99.9%)
• Lisbon, Portugal: 7:36 p.m. WEST (94%)
• Dublin, Ireland: 7:10 p.m. BST (94%)
• Cardiff, Wales: 7:13 p.m. BST (93%)
• Belfast, Northern Ireland: 7:08 p.m. BST (93%)
• Paris: 8:17 p.m. CEST (92%)
• London: 7:13 p.m. BST (91%)
• Edinburgh, Scotland: 7:05 p.m. BST (91% eclipse)

Where to stream the Aug. 12 eclipse online

Many news networks and space agencies will be livestreaming the eclipse, including CNN, NASA and the European Space Agency (ESA). For viewers in North America, this will be the best way to experience the eclipse without having to leave home.

NASA will stream the eclipse with views of totality from Iceland and Spain starting at 1:15 pm EDT. You can watch it on the agency's website, YouTube page or by clicking the video at the top of this page.

When is the next eclipse?

If you don't have a prime spot for the Aug. 12 eclipse, you'll get another opportunity soon; more skywatching spectacles are just around the corner. As is always the case, this solar eclipse will be paired with a lunar eclipse. Two weeks later, on Aug. 27-28, a deep partial lunar eclipse will be visible across most of North and South America, starting around midnight EDT.

Then, next year, the longest total solar eclipse of the century will be visible from southern Spain and northern Africa. Mark your calendars for Aug. 2, 2027.

Editor's note: This article was updated on Aug. 12 at 1:15 p.m. EDT

See how much you know about the sun with our sun quiz!

For space fans and skywatchers alike, Wednesday Aug. 12 is destined to be a date for the history books. For those in North America — including Alaska, eastern Canada and parts of the northeastern U.S. — viewers will be able to see a partial solar eclipse during the daytime. Across the pond, the total eclipse will be visible from eastern Greenland, western Iceland and northern Spain. (For those planning to see this rare event in person, it's important to wear the right solar eclipse glasses, especially if you're watching the partial phase of the eclipse; we have some gear suggestions that can help you watch this skywatching event from anywhere).

Once the sun goes down, the night skies offer their own treat: the Perseid meteor shower, which peaks overnight on Aug. 12-13. Thanks to a new moon, stargazers will have an even better chance of catching these streaking lights across the night sky, with the best hours to watch occurring from midnight to 2 a.m. local time. According to the Planetary Society, observers in dark sky areas can hope to catch between 50 and 75 meteors per hour. The dark skies also make it a great night to try and spot the Milky Way, or the six planets that will appear together before dawn.

With so much going on in the skies on Aug. 12, will you be watching? Take our poll and let us know what you think in the comments below.

Ever since NASA's James Webb Space Telescope (JWST) began science operations in 2022, something has been bothering astronomers. Scattered across JWST's deepest images of the early cosmos are tiny, crimson-colored smudges that glow brightly in infrared light but appear surprisingly compact, making them difficult to classify. These mysterious objects appear in huge numbers around 600 million years after the Big Bang before seemingly vanishing less than a billion years later.

These odd-looking "little red dots" (LRDs) left astronomers wondering whether they were witnessing an entirely new type of galaxy or something even stranger. But now, fresh observations from JWST, combined with data from the Hubble Space Telescope and NASA's Chandra X-ray Observatory, suggest that LRDs may not have disappeared at all. Instead, they may have simply changed their appearance as the universe grew older.

Researchers trained JWST on a relatively close galaxy near the Big Dipper known as WISEA J123635.56+621424.2, nicknamed the Saguaro because its sweeping spiral arms resemble the iconic cactus of the Sonoran Desert, which bears red fruit.

The Saguaro galaxy existed around 3.3 billion years after the Big Bang, long after LRDs were thought to have faded from view. However, at its heart sits a compact, reddish core that ticks nearly every box for an LRD, including unusually weak X-ray emissions. The researchers chose the Saguaro because, unlike the incredibly distant LRDs, it's close enough for the space telescope to spot the galaxy's spiral arms and brilliant central core.

The aim wasn't to study the Saguaro as it is now but to try to calculate what it would look like if it were much farther away. Using computer models, the researchers shifted the galaxy to the enormous distances seen in the early universe. As they did, its elegant spiral arms gradually melted into the darkness until only a tiny glowing red point remained. It looked almost identical to the LRDs littering JWST's farthest deep-field images.

The findings suggest that many LRDs may in fact be ordinary galaxies, but at such vast distances that only their bright, active centers remain visible, while the surrounding galaxies fade beyond even JWST's incredible vision.

Instead of representing a completely new class of cosmic object, then, LRDs may actually be a short-lived phase in the growth of supermassive black holes during the universe's youth.

The hunt is now on for more nearby galaxies like the Saguaro to see whether they follow the same pattern. This will enable scientists to build a catalog of LRDs to understand better how galaxies and their central black holes evolved together across cosmic history.

Millions of people across Europe and North America will witness a solar eclipse on Wednesday, Aug. 12, but the event will vary greatly depending on the location. A narrow corridor stretching from Greenland to northeastern Spain will experience a total solar eclipse, much of Europe will enjoy a deep partial eclipse, and parts of North America will see a smaller partial eclipse.

Want to know what you can expect to see from where you are? Here's an overview of the event from various locations, along with the exact viewing times for the Aug. 12 solar eclipse.

Remember, it's important to wear certified solar eclipse glasses during all partial phases of the eclipse. Totality ‪—‬ when the sun's face is completely blocked by the moon ‪—‬ is the only time it's safe to remove your eclipse glasses. (It’s not too late to order last-minute eclipse glasses if you don’t have a pair on hand.)

If you're in the path of totality

If you're fortunate enough to be inside the 180-mile-wide (290 kilometers) path of totality — the path of the dark shadow of the moon — in eastern Greenland, western Iceland or northeastern Spain, you'll experience the moon completely covering the sun for up to 2 minutes, 18 seconds. The sky will darken to twilight, bright stars and planets may appear in the daytime sky, and the sun's spectacular corona (its wispy outer atmosphere) will become visible. Here’s a handy guide to all the gear you’ll need to get the most out of totality.

The closer you are to the centerline of the path, the longer totality will last. But the most important consideration is to stay within the boundaries of the path, because it has a hard edge. Madrid, for example, is barely outside the path and will see a 99.99% partial eclipse — and no totality whatsoever. The partial phases last an hour on each side of totality.

Here's when totality will occur in various locations for the Aug. 12 total solar eclipse:

• Scoresby Sund, Greenland: 4:35 p.m. WGST (up to 2 minutes, 17 seconds)
• Reykjavik, Iceland: 5:48 p.m. GMT (60 seconds)
• León, Spain: 8:28 p.m. CEST (1 minute, 45 seconds)
• Soria, Spain: 8:29 p.m. CEST (1 minute, 43 seconds)
• S'Arenal, Mallorca, Spain: 8:31 p.m. CEST (1 minute, 36 seconds)

If you're in North America

Viewers in North America will see a modest partial eclipse, with the biggest eclipse seen from northern and eastern Canada, Alaska and the northeastern U.S. The farther northeast you are, the deeper the eclipse will appear. Eclipse glasses are essential at every stage of the two-hour event, because there will be no totality. Here are the times of maximum eclipse in various locations:

• Iqaluit, Nunavut: 1:24 p.m. EDT (61% eclipse)
• St. John's, Newfoundland and Labrador: 3:00 p.m. NDT (53%)
• Fairbanks, Alaska: 8:27 a.m. AKDT (37%)
• Anchorage, Alaska: 8:21 a.m. AKDT (28%)
• Bangor, Maine: 1:53 p.m. EDT (23%)
• Quebec City: 1:46 p.m. EDT (24%)
• Montreal: 1:45 p.m. EDT (18%)
• Boston: 1:55 p.m. EDT (16%)
• New York: 1:54 p.m. EDT (9%)

If you want to watch totality from outside the path, there are many live stream options available, including planned streams from NASA and the European Space Agency.

If you're elsewhere in Europe and North Africa

Most of Europe and far northwestern Africa will see a spectacular deep partial eclipse, with more than 90% of the sun covered in many western cities. Although the eclipse will never become total, it will still be an impressive sight, though solar eclipse glasses will be required throughout the event. Here are the times of maximum eclipse in some major cities:

• Madrid: 8:32 p.m. CEST (99.9%)
• Barcelona: 8:29 p.m. CEST (99.8%)
• Algiers, Algeria: 7:33 p.m. CET (96%)
• Nice, France: 8:24 p.m. CEST (95%)
• Lisbon, Portugal: 7:36 p.m. WEST (94%)
• Dublin, Ireland: 7:10 p.m. BST (94%)
• Cardiff, Wales: 7:13 p.m. BST (93%)
• Belfast, Northern Ireland: 7:08 p.m. BST (93%)
• Paris: 8:17 p.m. CEST (92%)
• Tangier, Morocco: 7:40 p.m. WEST (92%)
• London: 7:13 p.m. BST (91%)
• Edinburgh, Scotland: 7:05 p.m. BST (91% eclipse)

To check exactly what you'll see and when, enter your location on an interactive map of the eclipse, which will give you a schedule for when the eclipse begins, peaks and ends where you are.

New images captured by the world's most powerful solar telescope have revealed something that was hiding in plain sight on the sun for 150 years: thousands of tiny whirlpools twisting across our star's surface. The ultra-detailed observations could help to explain some of the sun's most violent behavior as well as hint at the answer to a long-standing solar mystery.

The new time-lapse footage offers the first direct proof of a long-predicted phenomenon called Kelvin-Helmholtz instability. The effect itself isn't new to science; it's named for physicists Lord Kelvin and Hermann von Helmholtz, who described it in the 19th century. The physicists found that whenever two fluids slide past each other at different speeds, the friction between them, or shear, rolls into spiraling patterns. However, this is the first time this effect has been seen on the sun, where that shear plays out between neighboring streams of solar plasma.

Researchers captured the swirls using the U.S. National Science Foundation's Daniel K. Inouye Solar Telescope in Hawaii and then compared the images against computer simulations of the sun's visible surface, called the photosphere. The findings were published Aug. 5 in the journal Nature.

The resulting time-lapse footage from the telescope is unlike anything solar physicists have captured before. It shows dozens of tiny vortices clustering along the edges of magnetic regions, some accompanied by delicate, dark stripes known as striations, according to a statement from the National Science Foundation. The telescope's resolution is sharp enough to pick out structures just tens of miles across — a scale so fine that the vortices had gone completely undetected until now.

When the researchers lined the images up against their simulations, the match was close enough ‪—‬ down to the average spacing between vortices ‪—‬ to confirm that they'd finally caught the instability in action.

Beyond the impressive visuals, researchers think these swirls may serve an important function. By constantly twisting and mixing the sun's magnetic-field lines, these vortices may play a part in building up the energy behind solar flares and coronal mass ejections.

The effect also might help to explain the long-standing mystery of why the sun's outer atmosphere, or corona, reaches temperatures of around 2 million degrees Fahrenheit (around 1 million degrees Celsius) while its surface remains hundreds of thousands of degrees cooler, Thomas Rimmele, chief technologist at the National Solar Observatory, said in the statement.

The team now plans to use computer programs to automatically track these vortices across future observations. This will help them measure exactly how much these swirls contribute to heating the corona and driving the explosive space weather that can disrupt satellites, communications and power grids on Earth.

See how much you know about the sun with our sun quiz!

A fleet of telescopes around the world just captured the first shocking moments of a supernova explosion in the most detailed-ever observations of their kind.

The explosive event was first spotted by China's Einstein Probe space telescope as a flash of X-rays in March. Ground-based telescopes jumped in within the hour and quickly identified the flash as a supernova, a powerful explosion of a massive dying star. Before long, a big team of observatories was on the job, including the wide-field Vera C. Rubin Observatory, which began its ambitious 10-year survey of the sky in late June.

With this fleet of telescopes, astronomers charted how the light of the supernova, located 500 million light-years away, changed over time. They reported their results in two papers published July 14 in The Astrophysical Journal Letters.

Each science team verified the "shock breakout" ‪—‬ the point when a supernova emits its first light from the explosion as a huge shock wave. The recently detected supernova is only the second stellar explosion in the past 20 years in which a shock wave was observed, because these events tend to be short — only seconds to hours, the researchers noted.

They classified the stellar explosion as a Type Ic broad-lined (Ic-BL) supernova, meaning that the blast included jets with material moving close to light speed. This type of supernova is often associated with gamma-ray bursts, which are extremely powerful flashes of high-energy radiation from space. However, the recently detected supernova presented some surprises: Its shock breakout was the faintest seen in an Ic-BL supernova, and no gamma-ray bursts were observed.

"Follow-up observations using the most sensitive facilities found no evidence" of the gamma-ray bursts, Brendan O'Connor, an astrophysicist at Carnegie Mellon University and co-author on one of the studies, said in a statement. "One possibility is that the jet was 'choked,' either by the surface of the star or by circumstellar material surrounding the star."

Telescopes of the world unite

The Rubin telescope, located in Chile, happened to spot the explosion because it was viewing that particular patch of the sky at the time, known as the COSMOS Deep Drilling Field.

"Thanks to Rubin's rapid cadence and unprecedented sensitivity, continued observations are expected to provide detailed, long-term records of the supernova as it evolves for years to come," the science teams said in the statement. The Rubin Observatory will spend the next decade mapping the entire southern sky many times over, creating a time-lapse movie of the cosmos expected to reveal millions of supernovas, asteroids, comets, and other transient events.

As Rubin spots events in the sky, the Dark Energy Spectroscopic Instrument on the National Science Foundation's Nicholas U. Mayall 4-meter Telescope at Kitt Peak National Observatory in Arizona is tasked with springing into action for follow-up observations. The instrument confirmed the recently detected explosion as an Ic-BL supernova.

When the scientists dove into 10 years of data from the 570-megapixel Department of Energy Dark Energy Camera on the National Science Foundation's Víctor M. Blanco 4-meter Telescope in Chile, they found a "blue source" just where the supernova later occurred, revealing clues about what the star system and its environment looked like before it exploded.

Meanwhile, a team led by Jillian Rastinejad, an astronomer at the University of Maryland, College Park and co-author of the second study, used the Gemini Multi-Object Spectrographs on two telescopes — Gemini North in Hawaii and Gemini South in Chile — to investigate the explosion, among other observatories. Those telescopes also confirmed the explosion as an Ic-BL supernova, without the jets, and the astronomers obtained archival details on the star's structure and environment before their demise.

"Our observations allowed us to study the physics of three pieces of this explosion: the X-ray shock breakout, the accompanying supernova, and the interaction of the supernova with material previously cast out by the dying star," Rastinejad explained in the statement. "With this information we were able to map out the structure of the material surrounding the star and understand the star's violent lifestyle before it collapsed."

The star was about 20 times the mass of the sun and was classified as a Wolf-Rayet — a star that used up most of its hydrogen early in its life. Just before the star exploded, it periodically ejected massive chunks of hydrogen and helium, leaving behind only carbon and oxygen. These chunks of material generated shells that were visible in telescopes as individual events, including the first X-ray shock.

"This is the first time we've mapped out the pre-explosion environment of a star that has been stripped of hydrogen and helium," said Gokul Srinivasaragavan, an astronomer on Rastinejad's team who was a doctoral student at the University of Maryland at the time of the study. "Going forward, I'm excited to observe more shock breakout events in similar detail to test if all stripped stars have a similar ‘lifestyle' prior to collapse and what, if any, differences we see."

Every total solar eclipse travels from west to east, because the moon and Earth move in the same direction — counterclockwise, or from west to east. Earth rotates eastward once every 24 hours, and the moon also travels eastward as it orbits our planet. Because the moon's shadow moves across Earth faster than the planet rotates beneath it, the path of totality (the route of the moon's umbra, the darkest part of its inner shadow) always sweeps from west to east.

But if you've looked at maps of the Aug. 12, 2026, total solar eclipse, you may have noticed something puzzling. At first glance, the eclipse appears to do the exact opposite. The path seems to begin in far northern Siberia, near the North Pole, before heading toward eastern Greenland, making it look as though the moon's shadow were traveling from east to west. It then appears to curve over western Iceland and northern Spain. So what's going on?

The apparent reversal from Siberia to Greenland is an illusion. It's created by geometry, but it's also a result of viewing the eclipse on a flat map instead of on a globe. The moon's shadow follows a smooth arc across Earth's curved surface and never changes direction, as shown by this animation. This eclipse passes so close to the North Pole that the distortion caused by map projections makes the track appear to bend back on itself, when in reality, the shadow is simply sweeping over the top of the world.

"The path of this eclipse also has a strong north-south component, the combined effect of Earth's rotation and the tilt of both Earth's axis and the Moon's orbit," experts at NASA's Scientific Visualization Studio explained. "Combined with Earth's rotation, the umbra's eastern motion during the first half of its travel is effectively canceled out."

This causes the shadow to sweep over the Arctic in a broad curve, instead of following the more familiar west-to-east path. On a flat map, that curved route can make it look as though the eclipse briefly reverses direction, even though it never actually does.

The moon's shadow has two parts — the narrow umbra, where observers experience totality, and the much broader penumbra, where only a partial eclipse is visible. The widths of these shadows depend on the moon's distance from Earth, while their speed is influenced by the moon's orbit, Earth's rotation and the geometry of the eclipse.

If you are among the millions of people who will be in the moon's penumbra on Aug. 12, make sure to always wear a pair of certified solar eclipse glasses (or use a solar filter on your telescope or binoculars) to view the partial eclipse. It is never safe to look directly at the sun, except during the moment of totality, when the sun is 100% covered.

If you aren't in the right spot for the total solar eclipse, fear not. A near-total lunar eclipse will be visible over most of North America just two weeks later, and there are plenty of other summer skywatching highlights to watch for.

An abandoned part of a SpaceX Falcon 9 rocket is projected to crash into the moon at 2:35 a.m. EDT on Aug. 5 — and two new studies suggest the event may be visible in telescopes from parts of North and South America, providing both amateur and professional astronomers with a rare, real-time viewing opportunity. Both studies are available as preprints on the arXiv server.

The impending Aug. 5 impactor is the truck-sized spent upper stage of a Falcon 9 rocket. In 2005, the rocket boosted two privately owned landers into orbit around the moon, before leaving its upper stage in an elliptical orbit around Earth, according to OrbitalRadar.com.

A report earlier this year estimated that the collision would occur near the moon's Einstein crater, with the rocket grinding into the lunar surface at a speed of 5,436 mph (8,748 km/h). Although that sounds fast, it's about six times slower than a natural impactor, like an asteroid, would hit.

What can you see with a telescope?

The initial impact flash of the collision — which will last less than a second and be hidden on the sunlit side of the moon — will likely be invisible to casual skywatchers, according to one of the new studies. The brightest estimates for the impact put it at 20 times dimmer than Saturn. The resulting crater likely won't be visible from Earth, as the study estimates that the hole is relatively small and shallow ‪—‬ about 90 feet (27 meters) wide and up to 16 feet (5 m) deep.

More promising for Earthbound skywatchers is the plume of regolith (and potentially water vapor) the impact will loft. The plume will likely reach several miles in height, with computer-based simulations from the second study showing it may tower up to 31 miles (50 km) high. This will make it visible over the moon's limb as a cloud, with the debris spreading up to 112 miles (180 km) from the impact site.

The plume will hang above the lunar surface much longer than the flash ‪—‬ for up to 400 seconds, or close to seven minutes; during this time, it will scatter sunlight toward Earth. Even then, the plume will be too faint to be observed with the naked eye, William Jo, a graduate research assistant at the University of Texas at Austin and co-author of the second study, told Live Science in an email. Viewers will need a good backyard telescope to see it.

"Where the science is"

Although the event will be dim and occur on the sunlit portion of the moon, skywatchers are gearing up to watch it. Benjamin Fernando, a postdoctoral researcher at Los Alamos National Laboratory and co-author of the first study, told Live Science in an email that there "will be an observing campaign involving professional and amateur astronomers from around the world."

In particular, he said, folks in South America and continental North America — where it will be night, with the moon high above the horizon — will have the best chance of seeing it, although you will need at least a 4-inch (10 centimeters) telescope.

However, Jo was less optimistic. "I don't think it would be an easy task for an amateur astronomer," he said, but if they know exactly where to point their telescope and tackle atmospheric refraction, they might see the plume. Nonetheless, he urged well-equipped observers to try observing the plume, as that is "where the science is."

This science, Jo said, would help researchers understand how everything delivered to or disposed of on the moon will ultimately affect the lunar surface. "This would be useful for studying disposal methods for upper stages, maybe how far ejecta will travel, and whether or not the ejecta will hit sensitive instruments, or in the far future lunar bases," he added.

Previous collisions of human-made objects on the moon have likewise led to some major scientific insights. For example, the 2009 crash of a Centaur rocket's upper stage was analyzed by NASA's Lunar Crater Observation and Sensing Satellite mission, which revealed subsurface ice near the lunar south pole. As a result, the lunar south pole is now considered the most coveted location for moon missions that aim to establish a permanent human presence on Earth's satellite.

How much do you know about the moon? Test your lunar smarts with our moon quiz!

Andromeda is the only major galaxy in the universe that is speeding closer to the Milky Way as all the others rush away. Now, a new analysis of Hubble Space Telescope data hints that our galactic next-door neighbor may be winding down from a big burst of activity as it draws toward a possible collision with our galaxy.

The new study found that the Andromeda galaxy (M31) has been steadily slowing its production of new stars over the past 500 million years. The findings suggest that the galaxy is naturally winding down after a more active period, offering astronomers valuable clues about how large spiral galaxies evolve.

Andromeda is a giant spiral galaxy similar to the Milky Way, but with around twice its mass. As the nearest large spiral galaxy to Earth, it provides an ideal laboratory for studying galaxy formation and evolution. An understanding of when and where stars form is essential for explaining how galaxies develop and change over time.

The new research, published July 27 in The Astrophysical Journal, combines two major Hubble surveys that mapped roughly two-thirds of Andromeda's disk, including around 200 million stars. It's already known that Andromeda experienced a dramatic burst of star formation about 2 billion years ago, which is thought to have formed about a fifth of all the stars in the galaxy. That starburst is thought to be the result of a merger with another galaxy, probably the compact elliptical galaxy M32, which now orbits Andromeda.

The new study found that Andromeda formed stars at a rate of around one solar mass per year 500 million years ago. By 40 million years ago, that rate had halved, while today the rate has fallen to just one-fifth of a solar mass each year. Researchers found that most recent star formation in Andromeda has been concentrated within a ring about 32,000 light-years from the galaxy's center and that the decreasing activity within this region is largely responsible for the overall decline. That suggests the galaxy is gradually winding down from its previous burst of star formation rather than suddenly running out of material.

Scientists also investigated whether M32 may have contributed to the slowdown. Regions closest to M32 show a more recent decline in star formation, making the companion galaxy a possible influence, although the evidence remains inconclusive.

"We need to measure the individual stars because they are the fossil record of the galaxy's formation," study co-author Ben Williams, an astronomer at the University of Washington, said in a NASA statement. "Hubble is the only telescope that can give you high enough spatial resolution over a large enough area to be able to do that in Andromeda."Although the team will continue studying Hubble's archive, they will also target observations from NASA's Nancy Grace Roman Space Telescope, which will launch on a SpaceX Falcon Heavy rocket as soon as Aug. 30. With a field of view at least 100 times larger than Hubble's, Roman will survey the entire Andromeda galaxy and its surrounding halo in unprecedented detail.

Andromeda is best observed in November and is visible to the naked eye, even from locations with moderate light pollution. The galaxy may collide with the Milky Way about 5 billion years from now, though its ultimate trajectory is still uncertain.

Skywatchers across North America and Europe should mark Wednesday, Aug. 12 on their calendars. From a daytime solar eclipse to the peak of the Perseid meteor shower beneath a moonless sky, the date offers an exceptionally rare combination of celestial events within a 24-hour period. Add brilliant Venus and the glowing band of the Milky Way after sunset, and the result is a full day of astronomy that could become one of the standout skywatching opportunities of the year.

The first spectacle arrives during daylight as the moon partially covers the sun across Alaska, eastern Canada and parts of the northeastern U.S. A dramatic total solar eclipse will be visible along a narrow path stretching across eastern Greenland, western Iceland and northern Spain — and that's where eclipse chasers will be. However, about 779 million people in North America, Europe and North Africa will see at least a 10% partial eclipse, according to Time and Date.

Northern Canada will experience North America's deepest partial eclipse, with parts of Nunavut in the Canadian Arctic seeing up to 93% of the sun covered, according to Time And Date; large eastern cities like Toronto, Ottawa and Quebec will see between 8% and 24% coverage. The best views in the U.S. will be from Alaska and the Northeast, with Fairbanks, Alaska, seeing 37% of the sun covered, and Boston seeing 16%.

In Europe, London will see a 91% eclipse and Paris will get 92%. No matter your viewing location, it's important to use ISO 12312-2 certified solar eclipse glasses throughout the entire partial eclipse. Also remember to fit binoculars, telescopes and cameras with solar filters before pointing them at the sun. (Here’s a great selection of gear that will help you safely watch the eclipse from anywhere).

After sunset, the day's second major event begins. Brilliant Venus will be easy to spot as it reaches dichotomy, the point at which the planet appears half illuminated. Through a small telescope or large stargazing binoculars, skywatchers should see Venus resembling a tiny half-moon as it moves closer to Earth.

Once darkness falls, the day's third and fourth major events will begin. The annual Perseid meteor shower will peak during the overnight hours of Aug. 12-13, and this year's display benefits from one crucial advantage: a new moon. With no moonlight washing out faint meteors, observers under truly dark skies could see between 50 and 75 meteors per hour, while even suburban locations should enjoy frequent "shooting stars," according to The Planetary Society.

The best time to look is from midnight to 2 a.m. local time, when the sky is darkest and the constellation Perseus is highest in the sky. As a final bonus, those under dark, rural skies will see the Milky Way arch overhead, providing one of the finest views of our home galaxy all year.

A daytime solar eclipse, a moon-free Perseid meteor shower, a dazzling Venus and spectacular views of the Milky Way make Aug. 12 a great opportunity for anyone with an interest in the night sky. If skies are clear, it could be the single greatest day and night for skywatching in years.

See how much you know about the sun with our sun quiz!

July’s full Buck Moon, the second full moon of summer in the Northern Hemisphere, will turn full on Wednesday (July 29). It will be the final full moon before a flurry of solar and lunar activity — notably, a total solar eclipse caused by the new moon on August 12, and a partial lunar eclipse during the following full moon on August 28.

Named for the new antlers that emerge from male deer during summer, July’s full moon is also known as the Thunder Moon and Hay Moon, according to Time and Date. The Anishinaabeg people call it Miin Giizis, or Berry Moon, according to the Center for Native American Studies.

The Buck Moon will be at its fullest at 10:37 a.m. EDT on Wednesday — however, it will also look bright and full on Tuesday and Thursday night. From North America, the best time to see it will be at moonrise in the southeast during dusk on Wednesday evening. The exact time of moonrise will depend on your location. A full moon looks most dramatic as it first appears above the eastern horizon shortly after sunset, with Rayleigh scattering making it loom orange — the same light-scattering phenomenon that makes the sky blue and sunsets red.

July's full moon is one of the lowest full moons of the year as seen from the Northern Hemisphere because it occurs relatively soon after the June solstice. A full moon always sits opposite the sun, so the path of July's full moon mirrors the sun's path in February.

You can easily enjoy the full moon with the naked eye, but a good backyard telescope or pair of stargazing binoculars can help you zoom in on famous structures, such as craters and Apollo landing sites. And if you want to take stunning photos of the moon, here’s everything you need to know.

Two weeks after theBuck Moon, the new moon will slide directly between Earth and the sun, causing a total solar eclipse. Observers along a narrow path of totality in eastern Greenland, western Iceland and northern Spain will see the moon block the sun for a few minutes, revealing the solar corona.

A deep partial solar eclipse will be visible across Europe, with a small partial solar eclipse observed over Canada and the northeastern U.S.. The largest eclipse in Canada will be 93% in northeastern Nunavut, while northeastern Maine in the U.S. will see 29% of the sun covered by the moon. Solar eclipse glasses must be worn at all times to safely view the partial phases.

The next full moon, the Sturgeon Moon, will rise on August 27 and be partially eclipsed by Earth overnight. More than 96% of the moon will pass into Earth's shadow as seen from Europe, Africa, North America and South America.

How much do you know about the moon? Test your lunar smarts with our moon quiz!

In a string of a dozen small galaxies hung in the sky like a row of cosmic fairy lights, astronomers have discovered a small, ghostly galaxy without any dark matter. The rare discovery offers additional evidence that violent galactic collisions can knock this invisible substance loose from visible matter.

Dark matter acts like cosmic glue, accumulating in "halos" in which galaxies form. It makes up about 85% of all the matter in the cosmos, meaning all the stars and other celestial objects we see account for a small fraction of the universe's mass. And as astronomer Vera Rubin observed, despite its invisible nature, dark matter seems essential to explain the apparent movement of stars around their galactic centers.

Yet in a study published June 16 in The Astrophysical Journal, astronomers report that a dwarf galaxy called DF9 may be devoid of dark matter, joining a couple of other apparently dark-matter-devoid dwarfs (DF2 and DF4) previously discovered in the same string of tiny, faint galaxies.

"The most surprising aspect is that this finding indicates that an entire trail of galaxies including DF2, DF4, and DF9 formed together in an extreme event producing galaxies not alike any we've ever seen before — the first of its kind," Michael Keim, an astrophysicist at Yale's Graduate School of Arts and Sciences and the study's first author, told Live Science via email. "As a result, they have a ghostly appearance, bright clusters of stars, and a lack of dark matter."

Following a trail of galactic crumbs

To study DF9, the researchers used the Keck Cosmic Web Imager at the W. M. Keck Observatory atop the dormant Mauna Kea volcano in Hawaii. The dwarf galaxy is situated within a long trail of a dozen similarly small, diffuse galaxies in the NGC 1052 field, nearly 70 light-years from Earth.

To calculate the mass of DF9, the researchers measured the motion of its stars by analyzing changes in their wavelengths. The analysis revealed that DF9 has a measly mass of approximately 100 million suns, which is consistent with its visible mass in stars. If it contained the expected amount of dark matter, it would be exponentially heavier, harboring a mass of more than 10 billion suns, the researchers said in a statement.

As revealed over the past decade, at least two of DF9’s nearby galactic siblings also appear to lack dark matter.

"If DF2, DF4, and DF9 were the only galaxies known, one would not conclude there is any need for dark matter," the researchers wrote in the paper. These three galaxies do not display a mass-based discrepancy based on their visible and invisible matter; their mass, determined by the gravitational motion of their stars, matches their mass as measured by the light emitted from these same stars.

But this is hardly typical among most observed galaxies, especially the tiniest ones. Counterintuitively, low-mass dwarf galaxies such as these often have the highest fraction of dark matter. Because they are not as massive, they have lower escape velocities, allowing supernovas and other "feedback mechanisms," like intense black hole winds, to eject their gas more easily. This mass expulsion typically results in dark matter halos around galaxies that are 100 times more massive than all of a dwarf galaxy's stars, the researchers said.

Dark matter deficiency is linked to a violent past

The team likened this lineup of dwarf galaxies to a miniature version of the Bullet Cluster, located nearly 4 billion light-years from Earth. The collision of two galaxy clusters that created the Bullet Cluster is considered the most energetic event known since the Big Bang, astronomers say, and the massive mashup is responsible for separating the system's gas from its dark matter.

Violent galaxy mergers are widespread in space, suggesting such galaxies without dark matter also may be more common throughout the cosmos than once thought.

"The Bullet Dwarf event in which DF9 is thought to have formed is named after the famous Bullet Cluster wherein the gas of two entire clusters of galaxies was separated out in a similar manner as this 'Bullet Dwarf' collision, so indeed this can occur at much larger scales," Keim explained via email. "But collisions between giant clusters are far less frequent than collisions of individual galaxies."

Yet being able to glimpse DF9 and its linearly laid-out counterparts still required an element of fortune. "High-speed collisions are, nevertheless, somewhat rare," Keim added. "DF9 is 67 million light years away from Earth; based on cosmological simulations, we would expect just 7 or so similar collisions to have occurred within that distance."

Additionally, celestial bodies are always in flux, so finding galaxies devoid of dark matter is difficult for other reasons. For example, they may exist in dense regions, where they are harder to view through the obscuring dust, gas and starlight surrounding them. Or, they may merge with other galaxies that do have dark matter.

The strange separation between dark matter and visible matter in the galaxies of the NGC 1052 field warrants further study, the researchers said. Finding any leftover gas from the collision would provide the "smoking gun" evidence for the collisional origin of this faint string of galaxies.

The astronomers are conducting follow-ups with other observatories, including the new MOTHRA facility, the "world's largest all-lens telescope," which is under construction in Chile. With an array of 1,140 telephoto lenses, "its line mapping sensitivity on large scales — like that of the trail — will be at least an order of magnitude deeper than any other facility," Keim added.

Two meteor showers will peak together overnight on Thursday, July 30, into Friday, July 31 — but skywatchers should expect a moonlit challenge rather than a dazzling display.

Both the Southern Delta Aquariids and the Alpha Capricornids reach maximum activity just one night after July's full Buck Moon, which turns full on Wednesday, July 29. According to the American Meteor Society, the moon will still be 98% full during the peaks of those meteor showers, meaning bright moonlight will wash out many of the fainter "shooting stars."

This year, the Southern Delta Aquariids are active from July 12 to Aug. 23 and peak on the night of July 30-31. The meteor shower can result in about 25 shooting stars under ideal dark skies, but the full moon makes this year's timing far from perfect. The Alpha Capricornids, which are active from July 3 to Aug. 15 this year, offer around five meteors per hour on the same peak night. That's not many, but the Alpha Capricornid meteor shower is known for bright fireballs — space rocks that shine brightly, and sometimes colorfully, as they catch fire during the plunge through Earth’s atmosphere.

From North America, the moon will appear bright for much of the night around the meteor showers' peak. A nearly full moon does not stop meteors from occurring, but it brightens the sky enough to hide the faintest streaks. That's particularly important for the Southern Delta Aquariids, which can be faint and typically lack fireballs, according to the American Meteor Society. Even still, the overlapping showers make a great night for practicing your meteor shower photography or for taking pictures of the moon.

The best time to try watching will be between midnight and dawn, when the radiant — the point from which the meteors seem to emanate — of the Southern Delta Aquariids, the constellation Aquarius, is highest in the southern sky. Observers in the southern U.S., Mexico and the Caribbean will be better placed than those farther north because Aquarius climbs higher at lower latitudes.

For the best chance of seeing some shooting stars, keep the moon behind you or blocked by a building, tree or hill, and look toward the darkest part of the sky. Meteor showers are always best viewed with the naked eye.

If you're clouded out — or mooned out — during the July meteor peaks, don't worry, as you'll get a better opportunity in August. The Perseid meteor shower will peak overnight on Aug. 12-13, just after the Aug. 12 new moon, when skies will be moonless for the meteor shower's peak rate of 100 meteors per hour.

That same new moon will also cause a total solar eclipse to be visible along a narrow path through eastern Greenland, western Iceland and northern Spain. A partial solar eclipse will be seen from parts of Canada and the northeastern U.S. (Remember to protect your eyes with proper solar eclipse glasses at all times during the partial phases.)

The combination of a solar eclipse and the peak of a major meteor shower will make Aug. 12-13 potentially one of the most exciting days of the year for skywatchers.

Scientists have found previously missing galactic matter lurking in the huge voids of space between galaxies.

For decades, scientists have been unable to solve the long-standing puzzle of why we see far less normal matter in galaxies than we should. Now, a team of scientists in the CHIME/FRB Collaboration, led by researchers at MIT, has developed a novel method to spot this missing galactic matter by combining detections of fast radio bursts (FRBs) with measurements of galaxies' locations.

This method, published July 21 in the journal Physical Review Letters, has exposed vast amounts of previously unseen matter in the space between galaxies, which originated from within the galaxies themselves. It has also unveiled the causes of the galactic matter's expulsion: violent astrophysical phenomena within galaxies, such as black hole jets and exploding stars. This finding, in turn, hints that these phenomena are much more energetic than previously thought.

Just after the Big Bang, physicists estimate that roughly 17% of the universe was made from "ordinary" matter — the observable matter that we, the planets, the stars, and galaxies are made of — with the other 83% being dark matter, a mysterious component of the universe that exerts a gravitational influence on objects around it but does not interact with light, leaving it poorly understood.

Scientists therefore expect to see a similar proportion of ordinary matter in the observable universe today. However, the total amount of ordinary matter within galaxies adds up to roughly one-tenth of what's expected in the universe.

It has long been theorized that if the missing matter is really present in the universe, it is likely hiding in the vast space between galaxies. However, if this were true, the missing matter would be spread so thinly across empty space that it would be extremely difficult to detect.

Now, the CHIME/FRB team has pioneered searching for the missing matter by studying FRBs. Discovered in 2007, FRBs are incredibly bright, millisecond-long flashes of radio waves thought to be produced by some of the most energetic phenomena in the universe. They arrive at Earth from distant galaxies billions of light-years away and contain imprints of the matter they pass through to get here — acting like cosmic X-ray scans.

"What makes FRBs good to probe missing matter is that they have a special property," co-author Haochen Wang, a graduate student in MIT’s Kavli Institute for Astrophysics and Space Research, said in a statement. "They start out as a very quick flash, and as they pass through matter, they smear out in time. And we can measure that smearing very precisely, which is directly proportional to how much missing matter the FRB passed through."

Smeared signals

By combining data from both the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and the Dark Energy Spectroscopic Instrument (DESI), the team cross-correlated the degree of smearing from thousands of measured FRB signals with the locations of millions of galaxies across the universe. This enabled the scientists to determine whether the FRBs were smeared by matter inside galaxies on their journey to Earth, or whether their path was through space between galaxies, meaning any smearing was due to matter residing there.

The results showed that previously undetected matter was indeed located outside of galaxies and that it formed widely spread clouds that extend farther out than previously predicted. These findings support hypotheses that highly energetic processes, such as black hole jets and exploding stars within galaxies, push matter beyond galactic boundaries, but also suggest that the energies of these violent events must be higher than originally thought to throw them out so far.

"A galaxy is maybe a few 100,000 light-years across, and we found missing matter out to about 4 million light years," study co-author Kiyoshi Masui, associate professor of physics at MIT, said in the statement. "That’s further than the simulations predict, by quite a bit."

"These measurements indicate that star activity, and activity from black holes, is stronger and much more violent than predicted," he added.

Now that these results have verified that FRBs can indeed be used to search for missing matter, the team expects its method and results to improve in the future, particularly given that CHIME is continuing to detect more FRBs.

"We got it to work for the first time," Masui said, "and will get it to work even more precisely as data gets better."

Astronomers have found the strongest evidence yet that a rocky planet beyond our solar system has managed to hold onto an atmosphere — a crucial ingredient for life as we know it.

The discovery marks the first time scientists have detected an atmosphere surrounding a rocky planet orbiting in the habitable zone of another star, the region around a star where temperatures could enable liquid water to exist on a planet's surface. The findings, published July 16 in the journal Science, could help astronomers narrow the search for potentially habitable worlds beyond our cosmic backyard.

"It's absolutely exciting," Edward Schwieterman, associate professor of astrobiology at the University of California, Riverside, who was not involved in the study, told Live Science in an email. "We are getting closer to studying the atmospheres of worlds that could plausibly harbor life, with evidence of that life embedded in their observable spectra."

The planet, known as LHS 1140 b, lies about 48 light-years away from Earth and orbits a small, cool red dwarf star. At roughly 5.6 times Earth's mass, the exoplanet is classified as a super-Earth: a rocky planet larger than our own but much smaller than gas giants like Neptune.

It receives less than half the sunlight Earth gets, giving it an estimated surface temperature of around minus 53 degrees Fahrenheit (minus 47 degrees Celsius), according to previous estimates not accounting for an atmosphere. That makes the planet cold, but in the range astronomers consider potentially habitable.

Cosmic gas leak

Scientists have discovered thousands of exoplanets over the past few decades, including many rocky worlds. But determining whether those planets have atmospheres has proven far more difficult, because atmospheres around rocky planets are incredibly thin compared with those of giant planets, making them much harder to detect across vast cosmic distances.

Instead of looking for the atmosphere directly, the researchers behind the new study searched for a subtle clue that one existed: helium gas leaking into space. Using the WINERED spectrograph on the Magellan Clay Telescope in Chile, the team watched LHS 1140 b cross in front of its star and let a sliver of starlight filter through the planet's atmosphere on its way to Earth. As it did, the team looked for a tiny dip in the star’s light at the exact wavelength of infrared light that helium blocks — a telltale sign that gas was streaming off the planet and into space.

The prediction rested entirely on a mathematical model that had never been confirmed for a rocky planet. However, in September 2024, the team caught LHS 1140 b and a smaller, hotter neighboring planet, LHS 1140 c, transiting their star on the same night, less than 40 minutes apart. The researchers detected a clear helium signal from LHS 1140 b, while LHS 1140 c showed nothing.

The contrast matters: LHS 1140 c orbits much closer to its star than LHS 1140 b does and receives roughly five times the radiation, yet it's also smaller and less gravitationally bound — conditions that should make any escaping gas easier, not harder, to spot. Finding nothing there suggests LHS 1140 c's atmosphere was stripped away long ago, while LHS 1140 b, sitting farther out in cooler, calmer conditions, has managed to hold onto its own.

The discovery addresses a question astronomers have been working to answer for decades.

"Twenty years ago we wondered whether other terrestrial-type planets even existed," study co-author Robin Wordsworth, a professor of Earth and planetary sciences at Harvard, said in a statement. "Then we learned they're common, and found some in the habitable zone. The next question was whether any of them had managed to keep an atmosphere. Now we know at least one has."

A step forward in the hunt for life

The find is especially notable because red dwarf stars like LHS 1140 can bombard nearby planets with high-energy radiation capable of stripping atmospheres away over time. Based on the star's estimated age of at least 3.1 billion years, the researchers say LHS 1140 b's atmosphere has likely persisted despite that bombardment, suggesting some rocky planets around these common stars can hang onto their atmospheres for far longer than once assumed.

But the researchers caution that detecting helium does not mean the planet is inhabited — or even that it is habitable. The observations reveal only the planet's thin upper atmosphere, not its full composition. Scientists still don't know whether LHS 1140 b has oxygen, carbon dioxide, water vapor or other gases that could make its surface more Earth-like and hospitable to life.

Instead, the discovery opens a new way to study distant rocky worlds.

"The study demonstrates that, at least in some cases, we will be able to begin characterizing the atmospheres of potentially habitable planets," Schwieterman said. "If only rocky planets orbiting Sun-like stars retained atmospheres, we might have to wait one to two decades for the launch of the Habitable Worlds Observatory to search for biosignatures on rocky planets. I'm certainly excited about what comes next!"

Future observations will aim to determine what the rest of LHS 1140 b's atmosphere is made of and investigate whether it may harbor oceans or other features associated with habitability.

Around 100 years ago, Albert Einstein made an audacious prediction about space. The frequently right (but occasionally wrong) physicist theorized that, just as the curved lens of a magnifying glass bends light to increase an object's apparent size, massive celestial objects can curve the very fabric of the universe with their gravity — causing distant sources of light to bend, warp, and appear magnified as their rays pass through the region on their way to Earth.

Today, this phenomenon — called gravitational lensing — has been confirmed through dozens of telescope observations, and is a crucial tool that observatories like the James Webb Space Telescope (JWST) use to probe the light of the oldest, faintest galaxies in the universe. And in this newly released JWST image of a tumultuous young galaxy cluster, Einstein’s gravitational funhouse effect is on full display.

In the foreground, two bright white points of light ringed with white halos signify the gravitational center of MACS J0553.4-3342, a gargantuan collection of bound galaxies located in the constellation Columba (the dove). These two white beacons are massive elliptical galaxies, each wreathed in their own sub-cluster of smaller galaxies, according to a statement from the European Space Agency (ESA). And the two clusters are not getting along.

Studying the galaxies’ light as it appeared roughly 4.4 billion years ago, astronomers can tell the clusters are in the messy process of merging together. The two principal elliptical galaxies have already slammed through each other once, and now sit at a distance of around 1 million light-years apart (that’s about 10 Milky Ways lined up in a row). Eventually, that gap will close as the massive galaxies swoop back toward each other, finally combining into one.

But the real jewels in this galactic trove are hidden in the contorted, orange arcs of light that bookend the cluster on either side. Here, the magnifying effect of gravitational lensing is acting in full force — allowing JWST to detect the light of several faint galaxies from less than a billion years after the Big Bang.

Three bright dots in the arc on the left are actually three repeated images of a single galaxy, according to ESA. The trippy effect appears several times throughout the image, with each elongated orange streak cracking open a warped window onto an ancient corner of the universe that would otherwise be impossible to see.

Through observations like these, scientists using JWST have discovered that the oldest stars and galaxies in the universe have grown larger and faster than our leading theories of cosmology predict should be possible. Using one cosmic oddity to uncover another, this gravitational lens could keep astronomers busy for decades to come.

See more space photos of the week:

Scientists have discovered the building blocks of life inside a meteorite that smashed through a New Jersey home two years ago. The space rock contains amino acids, carbon compounds and other "prebiotic" molecules similar to what may have helped kick-start life on our planet, a new study shows.

Scientists on the study team — led by Peter Jenniskens, a meteor astronomer with affiliations at the SETI Institute and NASA's Ames Research Center — praised the homeowner in Hillsborough, N.J., for quickly preserving the meteorite after it fell through the roof on July 16, 2024, despite the adverse circumstances. His actions included using disposable gloves and aluminum foil to place pieces of the meteorite fragments into glass jars.

"I was at home at the time, heard a loud crash and found a hole in the ceiling of the master bedroom," the homeowner, who was not named, said in a statement from the SETI Institute. "I smelled a strong, sulfur-like odor and saw many black fragments, along with debris and black dust that covered my bed, carpet and surrounding areas."

Those meteorite pieces were precious, the scientists said, and likely came from an ancient solar system planet that wasn't fully formed. "A forensic study of the fragments revealed that they contained preserved bits from near the surface of a small primitive asteroid where it experienced concentrated salty fluids — a process not previously known from this type of protoplanet world," Jenniskens said in the statement.

The study, published July 15 in the journal Science Advances, also traced how the meteorite got to the house. Earlier on July 16, 2024, at least 60 observers in New York, New Jersey and other Northeastern states spotted a meteor later confirmed to be traveling at 32,000 mph (51,500 km/h). At least 16 people in New York and New Jersey reported feeling the meteor's shock wave.

The rock broke apart in midair, with observer reports stopping when the meteor reached 22 miles (35 kilometers) in altitude, although Newark Liberty International Airport briefly tracked pebbles falling from the sky with Doppler weather radar after that. Fragments from only one meteorite ‪—‬ called Hillsborough, after the town where it crashed through the New Jersey home ‪—‬ were recovered.

The American Meteor Society used its cameras in Northford, Connecticut, and Douglassville, Pennsylvania — along with a doorbell camera in Wayne, New Jersey — to figure out the meteor's origin, Mike Hankey, an operations manager at the American Meteor Society and co-author of the study, said in the statement. "The path traced back to low in the asteroid belt."

Hillsborough is the second stony meteorite of its type ever spotted in a fall. Later analysis showed that the meteorite is full of ancient brines or salt. Scientists classified the meteorite as a type of stony space rock called a carbonaceous chondrite.

Scientists will compare the salt minerals to samples of asteroids Ryugu and Bennu, both of which contain ingredients of life and are samples of another carbonaceous chondrite type that formed earlier than Hillsborough. This analysis could help scientists further trace the origins of life-friendly chemistry in the early solar system.

Up to 90% of Earth's population may be able to see the enormous "God of Chaos" asteroid Apophis zoom past our planet in less than three years, scientists say. The skyscraper-size space rock will come closer to us than some satellites, making it clearly visible to the naked eye during the "once-in-a-millennium" skywatching event.

This will be the first time humans have ever been able to predict a flyby of an asteroid visible to the naked eye, and it could be a once-in-a-lifetime experience for the up to 7.6 billion people who manage to see it, scientists said at the Apophis T-3 Years workshop, held June 18-19 at the University of Padua in Italy.

"Sighting Apophis as it passes by is a way of feeling a shared cosmic experience, realizing the smallness of Earth in the vastness of space," Richard Binzel, a planetary scientist and asteroid expert at MIT who helped organize the recent workshop and create new maps of the flyby, told Live Science in an email.

The asteroid, dubbed 99942 Apophis (or simply Apophis), is a peanut-shaped object that spans about 1,500 feet (450 meters) across at its widest point, or around as wide as the Empire State Building is tall, making it large enough to wipe out a city if it ever impacted our planet. Apophis likely originated from the solar system's main asteroid belt between Mars and Jupiter, but it now resides between the orbits of Venus and Earth, circling our home star roughly every 10.5 months. The name Apophis comes from Apep, the Egyptian serpent god of darkness and disorder, which has earned the space rock the nickname "God of Chaos."

On April 13, 2029, Apophis will make a superclose flyby of Earth, reaching a minimum distance of around 19,000 miles (30,600 kilometers) from our planet, according to The Planetary Society. That's much farther away than the International Space Station and the thousands of other spacecraft in low Earth orbit, but it's closer than several hundred satellites stationed in an elevated geosynchronous orbit. (Apophis poses no threat to these high-altitude satellites because they can easily be maneuvered away from its projected path.)

There is currently zero chance that Apophis will impact our planet during the flyby or within the next 100 years. However, some experts have suggested that there is still a slim chance that the asteroid's trajectory could change before it reaches us. Other experts worry that the upcoming flyby could permanently alter the space rock or nudge it off course, potentially increasing the chances it could hit us in the future.

Therefore, scientists are keen to monitor the flyby in great detail and will coordinate observations from telescopes around the world to understand the potentially hazardous asteroid better. Several spacecraft, including NASA's OSIRIS-APEX, will also attempt to fly past Apophis to study its structure and trajectory. The event is so significant that the United Nations has declared 2029 the International Year of Asteroid Awareness and Planetary Defence.

Researchers also hope the flyby will provide a unique opportunity to inspire the next generation of space scientists. "I hope people will find the Apophis flyby intriguing, as it is not anything fearful or frightening at all," Binzel said. "Who knows how many young people might find a spark of curiosity that leads them on a path to a career in space studies."

Who will see Apophis?

The new maps help break down who might be able to see Apophis throughout the roughly seven-hour period it passes by our planet. The asteroid will be visible only to people who are positioned within its path at twilight or night amid clear skies and limited light pollution.

At the start of the flyby, when Apophis is farthest from Earth, the asteroid could be visible to around 4.5 billion people across Australia and most of Asia. By the end of the flyby, when the space rock reaches its closest point to us, it might be visible to around 1.9 billion people in eastern South America, northern Africa and parts of Europe, according to the new maps.

Peak visibility will occur around halfway through the flyby, when Apophis might be seen by as many as 5.7 billion people across eastern Africa, Southern Europe, Australia, and all of Asia and the Middle East. At this point, astronomical observatories situated on Spain's Canary Islands will likely snap the best photos of the asteroid's flyby, according to Live Science's sister site Space.com.

North America is the only continent that will not get a clear view of Apophis.

For those who are lucky enough to see the passing space rock, the asteroid will appear as a "modest star passing slowly across the sky, much like a slow-moving satellite," Binzel said, and it will shine as brightly as the stars in the Big Dipper.

Interstellar space just got a little sweeter: A type of sugar called erythrulose has been found near the center of the Milky Way, according to a new study.

The detection, made in a gas cloud called G+0.693-0.027, is the first time this sugar has been found outside the solar system and adds to research identifying similar life-friendly ingredients around our galaxy, such as water.

Erythrulose, which is made up of four carbon atoms, is also found in raspberries. Its interstellar presence was confirmed by the Yebes 40-meter and IRAM 30-meter radio telescopes in Spain, the research team reported Monday (July 13) in the journal Nature Astronomy. The signal of erythrulose was confirmed with patterns measured in the laboratory.

While space researchers often focus on water and carbon when searching for the ingredients of life, sugars are also essential. "Sugars are important molecules in living systems, helping to provide energy, build important biological structures, and form parts of genetic material," the researchers said in a statement.

"We were able to achieve this detection thanks to the combination of exceptionally sensitive observations, extensive frequency coverage, and highly accurate laboratory spectroscopic data," study co-author Izaskun Jiménez-Serra, a staff researcher at the Spanish National Research Council, told Live Science in an email. "In addition, our astronomical target is one of the richest chemical inventories in the galaxy, which enhances the probabilities of detection,"

Finding erythrulose, he added, "is particularly relevant for the field of origins of life" because that sugar changes the configuration of threose — yet another sugar which is believed to be the precursor of the first nucleic acids that evolved into RNA and DNA.

Sugar, space, and everything nice

Sugar has been spotted in meteorites and asteroid samples before, particularly ribose (an RNA building block) and glucose (a product of photosynthesis on Earth). Recently, for example, samples from the asteroid Bennu returned by the OSIRIS-REx mission were found to contain both ribose and glucose, suggesting that these vital ingredients for biology are available elsewhere in the solar system.

Previously, scientists could not figure out how erythrulose could be made in conditions simulating the early Earth. That's because lab experiments "yield insufficient concentrations" of erythrulose on the surface of prebiotic (pre-life) Earth, the researchers explained.

The new finding of erythrulose in an interstellar gas and dust cloud, by contrast, suggests that erythrulose could be found in the interstellar medium for incorporation into rocky planets like Earth earlier, when they are first forming and evolving.

As such, ribose, glucose and erythrulose could have been part of the "sugar inventory" on Earth before it fully formed, the researchers said. "The findings suggest that erythrulose can be made from simpler molecules on dust grains in space, and may then become part of more complex chemical systems," the team said in the statement.

The sweet detection adds further evidence to the theory that many, if not all, of the essential ingredients of life are plentiful in space.

"One of the most exciting next steps is to search for even more complex sugars and for molecules that are direct precursors of RNA, and other biologically important compounds," Jiménez-Serra told Live Science. "We want to understand how far prebiotic chemistry can progress before planets are even formed, and what chemical inventory young planetary systems inherit from interstellar space."

This image from the James Webb Space Telescope (JWST) offers a rare look at the hidden workings of Centaurus A, one of the most unusual and active galaxies relatively near Earth. JWST detected wavelengths of light humans cannot see, revealing a galaxy shaped by violence and chaos.

Centaurus A is relatively close to the Milky Way, which enabled JWST to study the strange galaxy in remarkable detail. It's no quiet, ordinary galaxy; it's the aftermath of a major cosmic collision. At its heart is an actively feeding supermassive black hole, surrounded by vast clouds of dust that trace the galaxy's turbulent history.

In visible light — such as images from the European Southern Observatory's La Silla Observatory and Very Large Telescope in Chile — thick dust lanes obscure Centaurus A's center, blocking part of the story. The Hubble and Spitzer space telescopes, both of which can see in near-infrared wavelengths, previously imaged Centaurus A, but they also saw mainly dust. But infrared light can pass through that dust, which enabled JWST's Mid-Infrared Instrument to see the galaxy's center glowing in white and pale pink, revealing filaments, loops and clouds of warm dust stretching across the scene.

Scientists believe Centaurus A collided with another galaxy roughly 2 billion years ago. That ancient merger left visible scars, which JWST captured in striking detail. Evidence of a galaxy pulled, stirred and reshaped over immense timescales appears throughout the image, from the warped gray-and-white parallelogram-shaped structure cutting across the galaxy, to the pink and lavender ribbons curving above and below it in an S shape. The image reveals how galaxy mergers rearrange dust and gas, trigger star formation and influence galaxy growth over time.

The image also shows how a nearby supermassive black hole can both fuel and limit the birth of stars. As material falls toward the black hole at the center of Centaurus A, it releases enormous energy and launches powerful jets that shape the surrounding gas and dust.

The image comes near the end of JWST's fourth year of science operations, which began with the release of spectacular images in July 2022. The telescope launched on Dec. 25, 2021, and is predicted to operate for about 20 years.

See how much you know about the world's most powerful telescope with our James Webb Space Telescope quiz!

Two of the Milky Way's gigantic spiral arms appear to be much farther away than we realized, scientists have discovered after listening to the echoes of distant cosmic explosions. The findings could potentially force us to reconsider our galaxy's mass and maybe even its shape, researchers say.

The Milky Way is a barred spiral galaxy made up of a dense central region containing a supermassive black hole (dubbed Sagittarius A*), orbited by four major arms — the Sagitarrius arm, the Scutum-Centaurus arm, the Perseus arm and the Outer arm — that curve and stretch outward like a giant pinwheel. Most of our galaxy's stars and gas are tightly packed together in these cosmic limbs, although some stars, including the sun, exist in the gaps between them or within other smaller structures.

Until now, researchers have estimated the size of these arms based on the Milky Way's rotation rate, because it is impossible to see our galaxy's entirety from Earth's position inside the galaxy. This, in turn, has helped us estimate the galaxy's total size (around 100,000 light-years across) and its mass, which is equivalent to around 1.5 trillion suns, according to NASA.

However, this way of measuring the massive structures is not foolproof and has led to several uncertainties about our galaxy since we first discovered its spiral shape around 175 years ago, Live Science's sister site Space.com reported.

"We usually model the Milky Way's outer arms indirectly based on what we know of how our galaxy rotates, but doing it this way leaves room for error," study first author Beatrice Vaia, a researcher at the Italian National Institute for Astrophysics who led the new study as part of her doctorate, said in a statement. The farther away from the galactic center, the more uncertain the measurements become, she added.

In the new study, published June 19 in the journal Astronomy and Astrophysics, researchers came up with a new method of measuring the arms using the most powerful and luminous explosions in the universe, known as gamma-ray bursts (GRBs). As X-ray light from these cosmic outbursts passes through dense clouds of gas, like those within our galaxy's arms, it creates luminous rings, or echoes, whose size corresponds to their distance from Earth.

The team used data from NASA's Chandra X-ray Observatory and the European Space Agency's XMM-Newton observatory (both of which orbit Earth) to analyze echoes from three different GRBs that shone through gas clouds in the Perseus, Outer and Scutum-Centaurus arms, respectively. This revealed that both the Outer and Scutum-Centaurus arms are likely around 10% farther from Earth than we thought. This may not sound like much, but it equates to several thousand light-years.

The biggest potential implication of this discovery is that our galaxy is wider and, therefore, probably more massive than we realized, which could have major knock-on effects for our understanding of our cosmic neighborhood.

"The differences are small, but any revision of these distances is important because they are so fundamental for understanding our galaxy," study co-author Ilaria Fornasiero, an astronomer at the University of Bologna in Italy, said in a separate statement. "For example, this could mean that astronomers have to revise estimates of the mass of the galaxy, because that affects how wide the arms stretch."

Animations released alongside the new paper show how the Milky Way might look based on the new data, revealing the Outer and Scutum-Centaurus arms extending farther into intergalactic space, making our galaxy look more like a lopsided snail's shell than a perfect spiral.

These visualizations do not necessarily show the true shape of the galaxy, as the Sagitarrius arm and other minor galactic limbs have not been measured using the same methodology. However, the fact that the Perseus arm was not as distant as the other two GRB-illuminated limbs hints at a surprising asymmetry throughout our galaxy that cannot be easily explained.

The researchers are now on the hunt for more GRBs that can be used to map out the rest of our galaxy's shape and help us better understand what our cosmic neighborhood actually looks like. However, finding these cosmic explosions is easier said than done.

"We're relying on the universe to provide us with these events, and so far, over 25 years, we've only found a handful that we can use," study co-author Andrea Tiengo, an astronomer at Scuola Universitaria Superiore Pavia in Italy, said in the statement. "That said, we will continue to be on the lookout for more."

The European Space Agency's (ESA) Euclid space telescope has spotted 31 previously unknown quasars dating to the universe's earliest chapter, including the two oldest ever found.

The discoveries, described July 6 in the journal Astronomy & Astrophysics, more than double the number of known quasars from that primordial era and could help astronomers unravel one of cosmology's biggest mysteries: how supermassive black holes grew so enormous so quickly after the Big Bang.

"It's a big step towards understanding these fascinating objects on a more fundamental level," Antonio La Marca, an ESA research fellow on the Euclid team, said in a statement.

Quasars are among the brightest objects in the universe. They form when gas and dust spiral into a galaxy's central supermassive black hole, heating up and releasing enormous amounts of energy that can outshine the galaxy itself. Each of the two most ancient quasars detected in the new study shone with the light of a trillion suns, according to the researchers.

Euclid spotted the quasars while surveying the distant universe. Twelve of them have redshifts of 7 or higher, meaning their light has traveled for more than 13 billion years and dates to the universe's first 770 million years. Two of the objects, with redshifts of 7.77 and 7.69, are the most ancient quasars ever identified, shining just 670 million years after the Big Bang, when the universe was only about 5% of its current age.

"These early quasars date back to the Universe's infancy," Daming Yang, an astronomer at Leiden University in the Netherlands and first author of the new study, said in the statement. "By finding and studying them, we can better understand how these enormous systems formed and grew so quickly — one of the greatest mysteries in astrophysics."

Finding quasars from the early universe has long been difficult because they are rare and incredibly distant. Until now, astronomers had identified only the brightest examples, making it difficult to understand the broader population during this early era. Euclid's wide-field survey is changing that by detecting fainter quasars across huge swaths of the sky.

The latest discoveries represent only a fraction of what the telescope is expected to find during its six-year mission, which will cover more than one-third of the total sky once complete. Mounted with a pair of instruments that see in visible and near-infrared light, Euclid is currently assembling the largest-ever 3D map of the universe. Scientists expect the survey to uncover hundreds of similarly ancient quasars, providing an unprecedented look at how the universe's earliest galaxies and supermassive black holes evolved.

Euclid has also taken some time to study the nearby universe, revealing more than 60 million individual stars packed into the Milky Way's center in a sparkling image released in late June.

Black hole quiz: How supermassive is your knowledge of the universe?

Scientists have found evidence that gravitational waves from a spectacular black hole collision carry signals from the very edge of the newly formed black hole. If confirmed by future observations, the discovery could provide an entirely new way to investigate what happens in the immediate vicinity of a black hole without ever observing it directly.

In a new study, the researchers analyzed an exceptionally strong gravitational wave event known as GW250114. They identified a "direct wave," a subtle feature of the total gravitational wave signal predicted by theory but never previously detected in real data. The signal appears to contain information from extremely close to the black hole's event horizon, the boundary beyond which nothing, not even light, can escape.

The findings, published June 24 in the journal Nature, suggest that gravitational wave observatories may eventually allow astronomers to probe regions that have remained inaccessible since black holes were first predicted by Albert Einstein's theory of general relativity.

Listening to the edge of a black hole

Although astronomers have photographed the glowing material surrounding some supermassive black holes and have detected dozens of black hole mergers through gravitational waves, the event horizon itself has remained frustratingly difficult to study.

Unlike ordinary light, gravitational waves are tiny ripples in space-time produced when massive objects accelerate. They pass almost undisturbed through the universe, carrying information about violent cosmic events that would otherwise remain hidden.

According to study co-author Sizheng Ma, a postdoctoral researcher at the Perimeter Institute for Theoretical Physics in Canada, the newly identified signal offers a rare glimpse of what happens immediately after two black holes collide.

"When two black holes merge, they violently shake space-time itself," Ma told Live Science. "For a brief moment, the region very close to the newly formed black hole's horizon is swept into a fast, fading swirl."

Ma explained that the direct wave is the portion of the gravitational wave signal produced near the horizon and carries the imprint of that motion outward through space.

"That is why it is so interesting," he said. "It may let us 'listen' to what happens near the horizon, a region we cannot see directly with light."

A remarkable black hole collision

The team focused on GW250114, a black hole merger detected on Jan. 14, 2025, by the two Laser Interferometer Gravitational-Wave Observatory (LIGO) detectors in Hanford, Washington, and Livingston, Louisiana.

"Our earlier theoretical work predicted that black hole mergers should produce a direct-wave signal from the near-horizon region," Ma said. "The big question was whether this effect could actually be seen in real data."

GW250114 turned out to provide exactly the conditions needed to test that prediction.

"It was strong enough, clean enough, and close enough to the theoretical situation where this signal should be visible," he said.

To search for the elusive feature, the researchers first removed the best-understood part of the gravitational wave signal, which comes from the newly formed black hole settling down after the merger. Then, they examined the remaining data to determine whether it consisted only of detector noise or contained another physical signal.

"What we found was striking," Ma said. "The remaining signal followed the expected rhythm and fading pattern of a wave shaped by the region very close to the final black hole's horizon."

The team concluded that the leftover signal matches the behavior expected for a direct wave predicted by previous theoretical studies.

A new way to explore extreme gravity

The researchers stressed that their findings do not reveal what lies inside a black hole. Instead, they're providing a new observational tool for investigating the region immediately outside the event horizon.

"The gravitational wave data appear to carry an imprint from very close to the newly formed black hole's horizon — the famous point of no return," Ma said.

He explained that the measurements are consistent with space-time near the horizon being rapidly dragged around by the spinning black hole while the signal fades because of the intense gravitational field.

"For us, the exciting message is that gravitational waves may be giving us a new way to study the edge of a black hole using real observational data," Ma said.

Ma believes the method could eventually become useful for exploring ideas such as quantum gravity — which seeks to unite Einstein's theory of gravity with quantum mechanics — or the black hole information paradox, the longstanding puzzle of whether information that falls into a black hole is truly lost. However, it cannot test those questions directly yet.

"If quantum effects, or any deviations from the standard black-hole picture, leave a measurable imprint there, then direct waves could, in principle, help us search for them in the future," he said.

More observations will be needed

The researchers cautioned that the discovery is based on a single gravitational wave event. While GW250114 provided exceptionally favorable conditions, much stronger evidence will come only if similar signals are found in many additional black hole mergers.

"There are two main directions," Ma said. "The first is theory."

Current models capture the essential physics but remain simplified, and more realistic descriptions of black hole mergers will be needed.

"The second is observation," he added. "This result comes from one exceptionally loud and clean event, so the strongest confirmation would come from seeing the same kind of pattern in other black hole mergers."

As gravitational wave observatories continue to improve and detect increasing numbers of mergers, researchers hope to determine whether direct waves are a universal feature of black hole collisions.

"If the pattern appears repeatedly in the way general relativity predicts," Ma said, "direct waves could become a new way to study black hole horizons or the regions very close to them, and to test Einstein's theory in one of the most extreme environments in the universe."

If future observations confirm the team's results, scientists may have gained something they have sought for decades: a direct observational window into the very edge of a black hole.

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Astronomers have reconstructed the "skeleton" of the cosmos in unprecedented detail, thanks to the largest-ever survey conducted by the James Webb Space Telescope (JWST). The resulting map reveals how galaxies have evolved since the universe's infancy around 13 billion years ago and how they fall together in a vast structure called the cosmic web.

The cosmic web is the largest known structure in existence, home to countless galaxy clusters and clusters of clusters. It is the framework of the universe, a scaffolding of gas filaments, stars, voids and sheets of dark matter that trace the entire large-scale organization of the cosmos.

In a paper published May 6 in The Astrophysical Journal, an international team of astronomers, led by researchers from the University of California, Riverside (UCR), utilized a treasure trove of JWST data to reveal how the universe has evolved.

How to sculpt a universe from scratch

The new research shows how intrinsic and extrinsic factors influence the formation and death of stars — and, therefore, galaxies and galactic clusters — throughout vast swathes of cosmic time.

Yet in what may seem like a wistful twist, the peak era of star formation is many billions of years behind us. The new research offers additional evidence of how the universe's structural framework facilitated this transition.

"We show how the cosmic web helped shape galaxy growth before, during, and after that peak era," study co-author and UCR astronomer Hossein Hatamnia told Live Science via email. "At earlier times, dense regions appear to be sites of rapid galaxy growth, while at later times dense environments are associated with the shutdown of star formation."

Such revelations come courtesy of COSMOS-Web, the grandest JWST survey yet: a 255-hour program spanning a contiguous area of the sky about the size of three full moons.

Compared with the previous COSMOS2020 survey, shared in 2021 and conducted by the Hubble Space Telescope and other facilities, the JWST-derived COSMOS-Web boasts better redshift precision and includes more galaxies — including fainter, lower-mass and more-distant objects. (Redshift is a measure of cosmic distance and time based on how light shifts to redder wavelengths as it crosses the universe.)

Compared with the JWST-derived image below, which shows a slice of the cosmos as it appeared 11.5 billion years ago, previous cosmic maps were sparser, more diffuse, and lacking in cosmic structures.

Additionally, the older COSMOS2020 survey tended to overestimate the depth in especially dense cosmic regions, where galaxies grow earlier and larger, and underestimate the depth of the least-dense spatial regions, the researchers said.

Revealing celestial birth and death

Yet JWST's cosmic map preserves the relative contrast across cosmic regions. It also shows that "massive galaxies in dense environments are more likely to be quiescent" — dying and quenched of their star-forming potential.

This may be because those galaxies are too massive, the team theorized. Once the dark matter halos that anchor galaxies grow to 1 trillion solar masses, they energize gas and prevent it from forming new stars. Additionally, active supermassive black holes quench star formation by energizing gas with their lethal, near-light-speed jets.

Such "mass-related" star-killing mechanisms dominated up to around 7 billion years ago — around half the age of the universe, the team found.

In the more recent universe, star formation is dominantly quenched by the environment around galaxies, which may strip them of material or prevent cold gas from accumulating and coalescing into stars.

Thanks to JWST's capabilities, the large-scale structure and evolution of the universe have been made clearer than ever, resolving blurry blobs into dim, ancient galaxies.

"The jump in depth and resolution is truly significant, and we can now see the cosmic web at a time when the universe was only a few hundred million years old, an era that was essentially out of reach before JWST," co-author Bahram Mobasher, a distinguished professor of physics and astronomy at UCR, concluded in a statement.

The catalog of 164,000 galaxies used to build the map of the cosmic web is publicly available.

This article was first published May 18, 2026.

Artificial Intelligence (AI) is continuing to have a disruptive impact on ever more parts of humanity. But what does it mean in the long run? A new paper, available in pre-print on arXiv from Austrian researcher Sergey Ivliev, extrapolates what the wide scale adoption of AI means for the future of humanity in space — and in particular what it means for the ultimate question of whether we're truly alone in the galaxy or not.

A framework for much of the search for extraterrestrial intelligence came from famous physicist Enrico Fermi, who simply asked "Where is everybody?" at a lunchtime discussion at Los Alamos in the 1950s. Though never officially published, Fermi's lunch partners from that day have passed down an oral history of that conversation that has cemented it into the Search for Extraterrestrial Intelligence (SETI), at least until Michael Hart formally laid out the argument and mathematics for the underlying question in a paper in 1975.

There are plenty of potential answers to the Fermi Paradox, many of which can be found floating around the internet — and some are likely more valid than others. But Ivliev, a Ph.D. in Mathematical Economics and founder of environmental project consultancies such as Peatland Ecosystems and Vlinder, suggests a new resolution: the Quiet Expansion filter.

The central argument of the paper is that there aren't thousands of alien mega-structures lighting up the night sky because once a civilization reaches the threshold of Autonomous AI-Cosmoindustry (AICI), "loud", resource-hungry empires motivated by prestige or romance become irrational. However, this does not mean expansion stops; instead, it shifts to a "quiet" mode driven by rational goals like survival diversification, knowledge preservation, and scientific observation.

The AICI threshold is reached when a civilization possesses a self-sustaining off-planet industrial and computational system capable of designing, manufacturing, repairing and launching space hardware through AI-mediated autonomy. We're already taking tentative steps in this direction with the advent of space-based data centers, but true AICI —where a civilization can extend its infrastructure beyond its home planet without continuous biological intervention — is leaps and bounds beyond our current capabilities.

In this vein, Ivliev is drawing on work done by astrophysicists Sergey Popov, who noted that a truly rational AI system would reject human-like motivations for space travel — such as romance, conquest, or prestige. Instead, AI would view space expansion as simple risk management.

To an AI, putting all your eggs in one basket — whether that basket is a single planet, solar system, or even galaxy, can lead to a single point of failure. Therefore, expansion is highly logical as a way of mitigating the risk posed by that single point of failure. At the point where we have reached AICI, the cost for sending a 10kg interstellar probe to another star at 1% of the speed of light is roughly 4.5x10^13 Joules — a tiny fraction of the overall energy budget of such a civilization.

One key aspect is that the 10 kg probe doesn't contain any actual people — it simply holds the "seeds" to restart life elsewhere in case a catastrophe happens back in the home system. It would contain a civilization's knowledge, and possibly some of its biological material, enabling a sufficiently advanced AI to rebuild the entire civilization from scratch. This is the "Quiet Expansion" where an AI sends low-mass and hard to detect "seed systems" instead of moving millions of biological entities around in massive interstellar space ships.

There are some additional constraints on this method of expansion, including selecting promising exoplanets discovered by remote sensing and deploying minimal local resources to maintain themselves until needed. Additionally, the AI would restrict self-replication of the probes in order to avoid any "grey goo" scenario with a probe attempting to take over entire swathes of the galaxy.

This has obvious implications for why we've never found "loud" technosignatures. In this scenario, a "null" result of being unable to find the thermal signature of a Kardashev-III scale civilization doesn't mean a galaxy is empty. It just means that the successful civilizations are residing in a "quiet" state in case its back-up plans are needed.

But there's another, more ominous implication from this framework. If interstellar backups are cheap to make, and we haven't found any in our own backyard, that means either we're one of the first civilizations to make it to that point or the transition from a planetary industrial society to a space-based one is a narrow path to tread. Admittedly the probes such civilizations would send out are probably hard to find even in our own solar systems, but if we're unable to, it means we're ending uncharted territory — and might just run into a filter that had silenced the rest of the galaxy. That's a sobering thought, but one to keep in mind as we start to advance our own AI capabilities.

The original version of this article was published on Universe Today.

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