21 July 2015, 04:25 PM ET
Famed physicist Stephen Hawking helped launch a major new search for intelligent alien life, despite having strong fears that such creatures would destroy humanity.
20 July 2015, 04:14 PM ET
The most far-reaching search for extraterrestrial intelligence (SETI) is now underway: A new $100 million initiative invites the world's top minds to scour the universe for signals from distant planets, scientists announced today (July 20).
20 July 2015, 03:57 PM ET
NASA released today (July 20) the first image of the sunlit side of Earth taken by the Deep Space Climate Observatory (DSCOVR) spacecraft from its final science orbit, and the beautiful photo has already made quite an impact.
17 July 2015, 11:31 PM ET
The engimatic flat region, which researchers have dubbed "Sputnik Planum," is broken into cell-like blocks and harbors mysterious pitted terrain and dark streaks of material that may have been deposited by Plutonian wind.
15 July 2015, 07:05 PM ET
The first close-up photo of Pluto revealed a mountain range rising 11,000 feet (3,500 meters) into Pluto's sky, along with a surface just 100 million years old at the most. A view of the dwarf planet's big moon Charon didn't disappoint, either.
15 July 2015, 01:17 PM ET
This morning, NASA's New Horizons probe will beam home the first haul of photos collected during Tuesday morning's Pluto flyby. NASA plans to unveil some of the best images during a news conference today at 3 p.m. EDT; watch it live on Space.com.
14 July 2015, 10:49 PM ET
NASA's New Horizons spacecraft has sent a status update home to its handlers here on Earth, indicating that the probe survived its historic encounter with Pluto this morning (July 14) — and that reams of amazing data should be on the way soon.
14 July 2015, 08:41 AM ET
New Horizons was 476,000 miles (766,000 kilometers) from the surface of the icy dwarf at 4pm EDT on July 13th, 2015. Closest approach will occur at 7:49am EDT on July 14th.
14 July 2015, 08:26 AM ET
NASA's New Horizons probe flew by Pluto this morning (July 14), capturing history's first up-close looks at the frigid, far-flung world and completing the initial reconnaissance of the solar system (if all went according to plan).
13 July 2015, 05:01 PM ET
Even 4.67 billion miles (7.5 billion km) away from Earth, the New Horizons mission at Pluto could help scientists learn more about planet Earth.
13 July 2015, 01:57 PM ET
Pluto may only be the beginning of NASA New Horizons' exploration of the Edgeworth-Kuiper Belt.
13 July 2015, 01:52 PM ET
Investigation of imagery and other data from the approaching probe reveal Pluto to be larger than previous estimates. Principal investigator Alan Stern explains the implications on ice composition, rock estimates, and atmospheric composition.
13 July 2015, 08:14 AM ET
On Tuesday morning (July 14) — nine and a half years after launching, and a quarter-century after its mission began to take shape — NASA's New Horizons probe will perform history's first flyby of Pluto.
11 July 2015, 08:11 AM ET
At the edge of Earth's magnetic field, oceanlike waves appear, and scientists think they may be responsible for the "space weather" that causes auroras and disrupts communications.
07 July 2015, 06:54 AM ET
A vortex of stars seems to swirl above Table Mountain in South Africa in the winning image of this year's International Earth & Sky Photo Contest. The entries draw attention to light pollution and the beauty of the night sky hovering above Earth.
06 July 2015, 04:57 PM ET
Nearly 30 observations were lost due to a glitch during a system update on July 4th, 2015. NASA principal investigator Alan Stern lists the data that will not be retrieved from July 4th until July 7th.
30 June 2015, 03:49 PM ET
A bright object lit up the skies at 1:29 EST on June 29th, 2015 across multiple southeastern states.
28 June 2015, 04:44 PM ET
An unmanned SpaceX cargo mission crashed back to Earth today (June 28), marking the third failure of a resupply flight to the International Space Station in the past eight months. SpaceX and NASA officials still aren't sure exactly what happened.
26 June 2015, 02:53 PM ET
Due to a "gradual slow down" of the Earth's rotation a 'leap second' has been added to June 30th. Scientists use a technique called Very Long Baseline Interferometry (VLBI) to measure how long it takes the Earth to make a full rotation.
25 June 2015, 12:19 PM ET
A Neptune-size planet with a giant plume of gas streaming behind it like a comet's tail has been discovered by astronomers, and is the first such planet ever discovered.
23 June 2015, 11:37 AM ET
A monster black hole in the heart of a barred spiral galaxy called NGC 1097 has the mass of 140 million suns, according to new measurements. A vivid video by the National Radio Astronomy Observatory describes how researchers "weighed" the black hole.
19 June 2015, 09:39 PM ET
In our solar system, the objects with rainfall, rivers and oceans can be counted on two fingers: Earth, and Saturn's moon Titan. Both also share a thick atmosphere, rocky ground and plate tectonics.
18 June 2015, 02:31 PM ET
The moon is surrounded by a permanent dust cloud likely caused by comet particle collisions, new observations reveal. NASA's LADEE moon dust probe data suggests the lunar dust cloud that is different than that seen by astronauts on Apollo 15 and 17.
18 June 2015, 07:22 AM ET
Researchers have found that the vast majority of brimstone — reverently referred to in biblical times as "burning stone," but now known more commonly as sulfur — dwells deep in the Earth's core.
17 June 2015, 10:44 AM ET
Reaching a a maximum throat temperature of 1253°C, an additively manufactured combustion camber and nozzle by Airbus Defence & Space survived 618 ignitions, a total operation time of over an hour and one continuous 32 minute burn.
15 June 2015, 02:32 PM ET
A European probe that made a bouncy landing on a comet last year and then slipped into an silent hibernation is alive again and phoning home. The Philae comet lander on Comet 67P/Churyumov-Gerasimenko beamed its "alive" signal home on Saturday, June 13.
12 June 2015, 11:13 AM ET
Astronomers have long known that galaxies spin more quickly than can be explained by the laws of physics.
12 June 2015, 11:07 AM ET
Supersymmetry is widely considered to be one of the most promising theories for extending our understanding of the Universe. In this video, Dr. Don Lincoln explains what Supersymmetry actually is.
11 June 2015, 12:55 AM ET
A baffling new mystery has turned up on Mercury — a pattern of giant cliffs and ridges on the planet's surface that defies any explanation that scientists have currently been able to offer.
11 June 2015, 12:34 AM ET
Saturn's giant newfound ring is even larger than previously thought, spanning an area of sky
nearly 7,000 times larger than Saturn itself, researchers say.
06 June 2015, 01:56 AM ET
On Wednesday, President Barack Obama mentioned something curious in a tweet — it was a message about the cosmos.
04 June 2015, 11:40 PM ET
NASA could land astronauts on the Red Planet by 2039 without breaking the bank, provided the space agency takes a stepwise approach that includes a manned 2033 trip to the Mars moon Phobos, according to the research.