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25 May 2012, 03:47 PM ET
NASA asked for help in reformulating its Mars exploration strategy. Boy did it get it.
25 May 2012, 02:01 PM ET
It's the first time astronauts have ever captured a commercial spacecraft in orbit.
25 May 2012, 12:07 PM ET
Aliens advanced enough to visit Earth probably wouldn't need anything from us, Jill Tarter says.
25 May 2012, 11:42 AM ET
SpaceX's Dragon is cleared to attempt to dock at the space station early tomorrow.
25 May 2012, 11:12 AM ET
An astronomer has proposed the existence of an unseen planet in the distant outskirts of the solar system. It would explain the peculiar motions of Kuiper belt objects.
24 May 2012, 04:32 PM ET
Organic molecules in Mars meteorites did not originate in alien microbes.
24 May 2012, 04:00 PM ET
The strange Medusae Fossae Formation may be 2 billion years older than previously thought.
24 May 2012, 02:19 PM ET
NASA's Cassini probe is preparing to tilt its orbit around Saturn dramatically.
24 May 2012, 01:09 PM ET
SpaceX's Dragon space capsule approached within 1.5 miles of the International Space Station early Thursday.
24 May 2012, 12:52 PM ET
The SpaceX Dragon capsule will fly within 1.5 miles (2.5 kilometers) of the space station early Thursday.
24 May 2012, 12:34 PM ET
The planetary candidate could be evaporating from the intense heat of its parent star.
24 May 2012, 12:11 PM ET
Representatives from seven different space agencies spoke about the benefits of international collaboration.
23 May 2012, 05:58 PM ET
Researchers are trying to understand the origins of the beautiful planetary nebula Sharpless 2-71.
23 May 2012, 05:12 PM ET
Opportunity was perched at the rim of Mars' Endeavour Crater when it took the picture.
23 May 2012, 03:21 PM ET
The Dragon capsule's liftoff brought SpaceX CEO Elon Musk relief and elation.
23 May 2012, 02:46 PM ET
Don Pettit captured images of April's Lyrid meteor shower from the space station.
23 May 2012, 11:18 AM ET
The Dragon space capsule is due to rendezvous at the space station Thursday.
23 May 2012, 10:49 AM ET
Skywatching tips for how to spot the Dragon capsule as it chases the space station in orbit.
22 May 2012, 03:11 PM ET
Private spaceflight got a boost today when SpaceX's Dragon launched successfully.
22 May 2012, 02:44 PM ET
Dragon lifted off atop a column of fire in pre-dawn Florida skies.
22 May 2012, 11:15 AM ET
The ashes of James Doohan launched on SpaceX's Falcon 9 rocket today.
22 May 2012, 11:01 AM ET
Tarter will shift to fundraising for the SETI Institute full-time.
21 May 2012, 03:53 PM ET
Beautiful shots of the solar eclipse of May 20, 2012.
21 May 2012, 03:36 PM ET
The May 20 Solar Eclipse from Nevada.
21 May 2012, 03:29 PM ET
From Asia to the United States, the May 20 annular solar eclipse was a sight to behold.
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