NASA orders a second ISS crew delivery from SpaceX
Astronauts can now look forward to as many as four domestic launches.
Orion spacecraft may fall behind schedule, go over budget
An independent review of the capsule program says NASA's cost and schedule estimates are unreliable.
Chinese satellite to test secure quantum communications
If the experiment works, it could lead to an encrypted, space-based internet.
ICYMI: NASA hunts for life hidden in an asteroid
Life could have begun with the impact of organic materials.
Watch SpaceX test fire one of the Falcon 9 rockets it relanded
The rocket burned for 2 minutes and 30 seconds.
NASA's new satellite will look for Earth-sized planets nearby
It will blast off in 2017 or 2018.
Researchers believe Jupiter's Red Spot is heated by thunder
A new theory suggests sound waves are warming the 2,500-degree storm.
Comet lander Philae says goodbye as communications are cut
Despite problems, it managed some impressive scientific work.
Milky Way's spinning 'halo' helps reveal how galaxy formed
The super-hot gas surrounding our galaxy is rotating almost as fast as we are.