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28 October 2015, 04:27 PM ET
In a surprise finding for scientists, the Rosetta spacecraft detected molecular oxygen in the gas streaming off comet 67P/Churyumov-Gerasimenko.
28 October 2015, 03:33 PM ET
NASA astronauts Scott Kelly and Kjell Lindgren successfully completed their first-ever spacewalks today (Oct. 28), completing a handful of tasks vital to the International Space Station's longterm endurance.
28 October 2015, 01:54 PM ET
One year after the explosive loss of an Antares rocket, Orbital ATK is getting ready to return to flight, and looking toward the role of the commercial spaceflight industry in low-Earth orbit.
28 October 2015, 01:50 PM ET
Cassini flew low through the Saturn moon Enceladus' icy plume today (Oct. 28) at 11:22 a.m. EDT (1522 GMT), zooming within a mere 30 miles (50 kilometers) of the satellite's frigid surface.
28 October 2015, 12:37 PM ET
SpaceX's Dragon spacecraft speeds over the surface of the Red Planet on its mission in one artist's conception.
28 October 2015, 12:26 PM ET
Using planetary orbits, physicists have pinned down just how precisely right Einstein was: Any deviations from his theory of general relativity are so small they would change calculations by just one part in 10,000 to one part in 100,000.
28 October 2015, 11:15 AM ET
As a big asteroid flies by at a close but safe distance from Earth on Friday (Oct. 31), astronomers will likely get a better radar view of the surface than ever before. Here's what we know.
28 October 2015, 09:50 AM ET
Looking at the night sky can be an inspiring moment for kids, and the right telescope can drive an interest in astronomy for a lifetime.
28 October 2015, 09:48 AM ET
Space rock 2015 TB145 is the size of a skyscraper at an estimated 1300 feet long (~400m) and will zoom past Earth on Oct. 31st, 2015 at a distance of roughly 300,000 miles.
28 October 2015, 07:28 AM ET
Astronomers around the world are keeping a close eye on a mysteriously dimming star, and their observations could soon shed light on whether it is indeed surrounded by some sort of "alien megastructure."
28 October 2015, 07:26 AM ET
World View Enterprises, which aims to loft paying customers to the stratosphere beneath a giant balloon, launched an uncrewed test flight Saturday, sending a 10-percent-scale version of its passenger capsule to an altitude of 100,475 feet.
28 October 2015, 07:19 AM ET
A new satellite concept, even smaller than Cubesats, is planned to be affordable to all. And they're launching in February.
28 October 2015, 07:17 AM ET
Astronauts are known for being in peak physical condition, but everyone gets sick at one point or another.
28 October 2015, 07:00 AM ET
Sifting datasets from the VISTA Telescope survey have detected 35 very young stars hiding in the thick dust of our galaxy’s "central bulge." This area has long been regarded as an old age home of Milky Way stars.  
28 October 2015, 07:00 AM ET
A previously unknown disk of very young stars has been discovered near the the peanut-shaped bulge at the center of the Milky Way. Scientists found the youngsers with thehelp of Cepheids — stars the change in brightness over days or months.
28 October 2015, 01:25 AM ET
NASA astronauts Scott Kelly and Kjell Lindgren will take the first spacewalks of their cosmic careers today (Oct. 28) at the International Space Station. Here's how to watch the action live online.
27 October 2015, 05:25 PM ET
Since 2004, the Cassini space probe has orbited Saturn, collecting photos and data that have revolutionized our understanding of the planet and its moons.
27 October 2015, 05:01 PM ET
The National Reconnaissance Office released Oct. 22 a trove of declassified records —including this video — from the 1960s about a military human spaceflight program.
27 October 2015, 03:55 PM ET
Game 1 of the 2015 World Series between the New York Mets and the Kansas City Royals launches tonight (Oct. 27), and not even astronauts are immune to baseball fever. Case in point: Former NASA astronaut Mike Massimino.
27 October 2015, 03:50 PM ET
With several "Star Trek" fan projects getting funded by independent crowdsourcing platforms lately, it's clear the franchise still has a lot of support after nearly five decades since "Star Trek: The Original Series" first aired.
27 October 2015, 03:46 PM ET
A star is dimming for reasons that astronomers can't explain. Is it an alien megastructure? What sort of alien megastructures would be possible?
27 October 2015, 03:30 PM ET
According to observations by Hubble and Kepler, the universe has only just begun to produce habitable worlds — what does this mean for the evolution of intelligent life?
27 October 2015, 03:08 PM ET
The full moon of October will rise tonight (Oct. 27) in a lunar treat just in time for Halloween this weekend, and it's a Hunter's Moon, so watch out for early werewolves. Here's some other names the full moon is known by.
27 October 2015, 11:15 AM ET
Will conscious computers conquer the cosmos?
27 October 2015, 09:56 AM ET
World View Enterprises of Tucson, AZ plans to charge $75,000 for 1 to 2 hours of “black sky” experience, with wi-fi, a bar, and a bathroom. A 10 percent scale model of their capsule was lofted to 100,475 feet via high-altitude balloon.
27 October 2015, 08:00 AM ET
The object, which is known as WT1190F, is expected to enter Earth's atmosphere on Nov. 13 above the Indian Ocean, about 62 miles (100 kilometers) south of Sri Lanka. The impending impact poses little risk to people, experts say.
27 October 2015, 08:00 AM ET
Pluto’s haze layer displays a blue color in this image obtained by the New Horizons spacecraft's Ralph/Multispectral Visible Imaging Camera (MVIC). Image released Oct. 8, 2015.
27 October 2015, 07:59 AM ET
Three serious accidents over the past 12 months have slowed the progress of commercial spaceflight, but the industry is far from grounded.
26 October 2015, 05:57 PM ET
The Eagle Nebula and the Star Queen nebula can be seen in this annotated view.
26 October 2015, 05:56 PM ET
On Wednesday (Oct. 28), NASA's Cassini spacecraft will zoom just 30 miles (50 kilometers) above Enceladus' surface, flying through and sampling the plume of material that erupts from the satellite's south polar region.
26 October 2015, 05:31 PM ET
On Oct. 28th, 2015, NASA's Cassini spacecraft will zoom past in excess of 19,000 mph, sampling the water plume emanating from its south pole. The instrumentation will be looking for signs of habitability on the icy world.
26 October 2015, 04:12 PM ET
Can you name that tune — from space? Tim Peake, a British astronaut, will challenge his Twitter followers to do just that while he's on the space station. Those who reply first with the correct title will win patches flown in space.