01 August 2013, 01:08 PM ET
New observations from NASA's Hubble Space Telescope have helped astronomers solve a longstanding mystery about galaxy evolution. It turns out that ancient galaxies stopped forming stars at a smaller size than their younger cousins did.
01 August 2013, 12:57 PM ET
A sun-watching spacecraft spotted our closest star opening its arms to the cosmos. Two strands of plasma from an eruption in the sun's atmosphere were captured in observations with NASA's STEREO A satellite.
31 July 2013, 01:35 PM ET
This intriguing space wallpaper reveals the spectacular stellar nursery IC 2944. The image was released on May 23, 2013 to celebrate a milestone: 15 years of ESO’s Very Large Telescope.
31 July 2013, 01:12 PM ET
Steady geysers of water ice on one of Saturn's icy moons appear to erupt more strongly when the moon is farthest from its ringed parent planet, scientists say. The warm vents at the south pole of Saturn's moon Enceladus emit vast plumes of water vapor.
31 July 2013, 10:56 AM ET
Now and then, Einstein deserves to be tested. To that end, scientists have put his special theory of relativity — particularly its notion of the speed of light as the cosmic speed limit — to the test.
30 July 2013, 01:11 PM ET
By analyzing sonic vibrations in a distant sunlike star, astronomers might have calculated exactly how fast the star spins and how much a nearby giant alien planet weighs.
30 July 2013, 12:58 PM ET
A newly discovered way to determine the spin of supermassive black holes could help shed light on the evolution of these bizarre objects and the galaxies they anchor. Astronomers used a European spacecraft to estimate one black hole's rotation rate.
30 July 2013, 12:50 PM ET
A strangely dense spot in the universe populated by a surprising amount of matter has been puzzling scientists since it was revealed in March in an all-sky map made by the European Planck satellite.
29 July 2013, 02:35 PM ET
An asteroid the size of five football fields will zoom past Earth tonight, and you can watch the close approach live. The online Virtual Telescope Project will stream live footag of the flyby of asteroid 2003 DZ15, beginning at 6 pm EDT.
29 July 2013, 09:34 AM ET
An onionskin-like structure of concentric dust shells surround a central, aging star as seen in this cool space wallpaper.
26 July 2013, 10:13 AM ET
This space wallpaper shows the ray pattern of dust that was ejected from the crater over a billion years ago, when an asteroid larger than a mile (1.6 km) across slammed into the Moon.
26 July 2013, 10:06 AM ET
A spectacular image captured by NASA's Hubble Space Telescope gives a deep-space view of Comet ISON, which could put on a dazzling show when it zooms through the inner solar system in late November. The photo is a composite of five images taken April 30.
26 July 2013, 09:50 AM ET
NASA’s IRIS spacecraft has taken its first photos of the lowest layers of the solar atmosphere, a little-understood region of the sun. The early observations suggest huge amounts of energy flow through this part of the sun's atmosphere.
26 July 2013, 09:35 AM ET
Scientists have uncovered a new key to understanding the strange workings of neutron stars — objects so dense they pack the mass of multiple suns into a space smaller than a city.
25 July 2013, 04:24 PM ET
The origin of energetic particles responsible for the premature deaths of many satellites has been traced, new research suggests. Electrons within belts of radiation that circle the Earth are excited by electromagnetic waves around the planet.
25 July 2013, 12:25 PM ET
The riddle of the age of meteorites from Mars might now be solved, with researchers finding these rocks from the Red Planet might not be billions of years old as some studies previously suggested.
25 July 2013, 10:52 AM ET
A new photo by NASA's sharp-eyed Mars Reconnaissance Orbiter shows the agency's Curiosity rover wrapping up work near its landing site before beginning the long trek to the huge and mysterious Mount Sharp, its ultimate science destination.
24 July 2013, 01:46 PM ET
Fast-paced star formation in some galaxies can starve future star generations, preventing galaxies from massive growth, scientists say. See how it works.
24 July 2013, 09:40 AM ET
This stunning space wallpaper reveals Supernova 1987A in the Large Magellanic Cloud. Glittering stars and wisps of gas create a backdrop for the self-destruction of a massive star.
24 July 2013, 09:26 AM ET
With the Hubble Space Telescope's successor on schedule to reach outer space in 2018, taking Hubble's place as NASA's premier eye in the sky, it seems appropriate to look back on what may become Hubble's most enduring legacy: its stunning images.
24 July 2013, 09:16 AM ET
NASA's Mars rover Curiosity is really starting to stretch its legs on the Red Planet. The 1-ton robot made by far the longest drive of its nearly year-long surface mission on Sunday, traversing 329 feet of Martian terrain.
24 July 2013, 09:04 AM ET
Comet ISON, which could put on a dazzling skywatching show when it zooms through the inner solar system later this year, is already blasting out huge amounts of gas and dust, new observations by NASA's Spitzer Space Telescope show.
23 July 2013, 03:34 PM ET
It's not often that some event comes along to really show humanity its true place in the universe, but two NASA spacecraft have just managed the feat. The photos of Earth from Saturn and Mercury give us perspective on humanity's role.
22 July 2013, 06:14 PM ET
NASA's Saturn system probe snapped imagery of the Earth and Moon on July 19th, 2013. Our home planet appears as a not-so-pale blue dot.
22 July 2013, 09:13 AM ET
This stunning space wallpaper is a Landsat image of the Clearwater Lakes in Canada’s Quebec province. Located to the east of the Hudson Bay, what appears to be two separate lakes is actually a single body of water that fills two depressions.
19 July 2013, 06:12 PM ET
NASA has granted funding to a dozen imaginative tech concepts, in the hopes that one or more of them will lead to big breakthroughs in space science and exploration.
18 July 2013, 01:34 PM ET
NASA's MAVEN mission's Neutral Gas Ion Mass Spectrometer will look at how matter interacts with the solar wind in the Martian atmosphere. This data could reveal why the formally wet Red Planet has become the barren world we see today.
18 July 2013, 11:59 AM ET
This space wallpaper of the nebula NGC 3603 shows globules of gas and dust; giant, gaseous pillars; young stars surrounded by debris disks; aging, massive stars; and a blue supergiant star—all various stages in star life.
18 July 2013, 09:29 AM ET
Gravity, get ready to meet your match. A team of students is counting down to light zero-gravity fires high in the sky today (July 18) aboard a jet plane designed specifically for weightless flights. The UCSD Microgravity Team is go.
18 July 2013, 09:19 AM ET
NASA's Mars rover Curiosity has notched a mileage milestone, reaching 1 kilometer (0.6 miles) of total driving distance as it heads toward a huge and mysterious Red Planet mountain. The 1-ton rover rolled past the mark on Wednesday, when a 125-foot (38 me
17 July 2013, 05:55 PM ET
All of the gold on Earth might have come from the collisions of dead stars, new research suggests. Scientists have discovered that the crashing together of two tiny but superdense neutron stars could be a cosmic catalyst for producing the valuable metal.
17 July 2013, 01:26 PM ET
Gold can only be made by titanic events like neutron star crashes. NASA's Swift satellite has detected a distinct glow from a gamma ray burst that reveals the creation of heavy elements including gold.