NASA science chief steps down
Posted: Thu, Mar 27 7:23 PM ET (2323 GMT)
The associate administrator of NASA responsible for the agency's science programs resigned Wednesday. Alan Stern, who took over as head of NASA's Science...

Shuttle makes delayed landing in Florida
Posted: Thu, Mar 27 12:37 AM ET (0437 GMT)
The space shuttle Endeavour landed safely in Florida Wednesday evening, one orbit later than planned because of weather issues. Endeavour touched down at the Kennedy...

XCOR announces suborbital vehicle plans
Posted: Wed, Mar 26 6:45 AM ET (1045 GMT)
XCOR Aerospace announced Wednesday plans to develop a suborbital rocketplane that could start flying people to the edge of space in two years. The Lynx...

Report: NASA considering putting Mars rover in hibernation
Posted: Tue, Mar 25 8:44 AM ET (1244 GMT)
A budget cut to NASA's Mars Exploration Rovers project could mean that one of the twin rovers could be put in "hibernation" for an...

Shuttle undocks from ISS
Posted: Tue, Mar 25 8:35 AM ET (1235 GMT)
The space shuttle Endeavour wrapped up a record-setting stay at the International Space Station and undocked from the station on Monday night. Endeavour separated...

Justice Department approves XM-Sirius merger
Posted: Mon, Mar 24 9:27 PM ET (0127 GMT)
The US Justice Department announced Monday that it would approve the merge of Sirius Satellite Radio and XM Satellite Radio without any conditions on the...

Astronauts complete final STS-123 EVA
Posted: Sun, Mar 23 10:22 AM ET (1422 GMT)
Two astronauts spent six hours outside the International Space Station Saturday night, completing a final set of tasks planned for the STS-123 mission. Robert...

Titan may have underground ocean
Posted: Sat, Mar 22 10:32 AM ET (1432 GMT)
Saturn's largest moon, Titan, may have an ocean of water and ammonia under its surface, planetary scientists reported this week. The evidence for the...

Martian salt deposits could be clue in search for life
Posted: Sat, Mar 22 10:20 AM ET (1420 GMT)
Salt deposits discovered on the surface of Mars in data from a NASA mission could help scientists identify prime locations to look for evidence of...

Astronauts test tile repair techniques on EVA
Posted: Fri, Mar 21 9:47 AM ET (1347 GMT)
Two astronauts successfully tested tools that could be used to repair damage to the shuttle's thermal protection system during a six-and-a-half-...