Mars water could have been cold and salty
Posted: Thu, May 21 6:43 AM ET (1043 GMT)
Liquid water may have existed on Mars early in its history even at sub-freezing temperatures because of the presence of ions in the water....

ESA unveils new astronauts
Posted: Thu, May 21 6:27 AM ET (1027 GMT)
The European Space Agency announced Wednesday six new astronauts, including the first British and Danish members of the European astronaut corps. The six new European...

Minotaur launches TacSat-3
Posted: Wed, May 20 6:53 AM ET (1053 GMT)
A Minotaur rocket successfully launched an experimental military satellite and small NASA spacecraft Tuesday evening. The Orbital Sciences Corporation Minotaur 1 lifted off from the...

Shuttle releases repaired Hubble
Posted: Wed, May 20 6:38 AM ET (1038 GMT)
The space shuttle Atlantis released the Hubble Space Telescope on Tuesday after astronauts successfully completed five days' worth of repairs to the venerable space observatory....

Hubble repairs completed on final spacewalk
Posted: Tue, May 19 7:15 AM ET (1115 GMT)
Astronauts worked on the Hubble Space Telescope for the final time on Monday, wrapping up repairs to the spacecraft that will allow it to continue...

Hubble instrument repaired despite difficulties
Posted: Mon, May 18 7:15 AM ET (1115 GMT)
Two astronauts struggled with a recalcitrant handrail on the Hubble Space Telescope Sunday but were eventually able to complete repairs to one of the telescope'...

Astronauts breeze through instrument replacement and repairs
Posted: Sun, May 17 9:25 AM ET (1325 GMT)
Spacewalking astronauts had few problems Saturday doing what had been considered one of the most difficult tasks of the STS-125 Hubble servicing mission. John...

Proton launches communications satellite
Posted: Sat, May 16 10:14 AM ET (1414 GMT)
A Russian Proton rocket successfully launched a commercial communications satellite early Saturday. The Proton M lifted off from the Baikonur Cosmodrome in Kazakhstan at 8:...

Hubble gyros and batteries replaced in extended spacewalk
Posted: Sat, May 16 10:02 AM ET (1402 GMT)
Two astronauts went into overtime on Friday to complete the replacement of a critical set of components on the Hubble Space Telescope. Astronauts Michael Good...

Report: Bolden likely to be picked for NASA administrator
Posted: Fri, May 15 8:28 AM ET (1228 GMT)
Former astronaut Charles Bolden is expected to be nominated by the White House as the next NASA administrator as soon as early next week, according...