New planet definition could demote Pluto
Posted: Wed, Aug 23 8:25 AM ET (1225 GMT)
Less than a week after astronomers proposed a definition for the term "planet" that could increase the solar system's total to at least 12,...

Astronomers find direct evidence for dark matter
Posted: Wed, Aug 23 8:15 AM ET (1215 GMT)
Astronomers using the Chandra X-Ray Observatory and other telescopes have found what they call "direct evidence" to support the existence of the mysterious dark...

Zenit launches Korean satellite
Posted: Tue, Aug 22 8:46 AM ET (1246 GMT)
A Zenit 3SL successfully launched a South Korean communications satellite Monday night. The Sea Launch Zenit 3SL lifted off from the Odyssey launch platform on...

Shuttle antenna bolts replaced
Posted: Mon, Aug 21 8:17 PM ET (0017 GMT)
NASA shuttle managers said that a weekend repair task on the shuttle Atlantis was a success, keeping the mission on track for a launch this...

Japanese space tourist dropped from Soyuz flight
Posted: Mon, Aug 21 1:42 PM ET (1742 GMT)
A Japanese space tourist who planned to fly to the International Space Station on a Soyuz flight next month has been removed from the mission...

SpaceX, Rocketplane Kistler win COTS awards
Posted: Fri, Aug 18 9:09 PM ET (0109 GMT)
NASA announced Friday afternoon that it has signed agreements with SpaceX and Rocketplane Kistler (RpK) that will provide the two companies with funding to help...

Hubble sees faintest stars in cluster
Posted: Fri, Aug 18 8:13 AM ET (1213 GMT)
Astronomers using the Hubble Space Telescope have detected the faintest stars ever found in a globular cluster, a discovery that helps refine the age of...

NASA sets August 27 launch for Atlantis
Posted: Thu, Aug 17 8:15 AM ET (1215 GMT)
NASA managers on Wednesday chose August 27th as the launch date for the next shuttle mission, provided that two issues with the shuttle Atlantis are...

IAU proposal would increase planet count to 12
Posted: Wed, Aug 16 7:46 AM ET (1146 GMT)
A proposal announced Wednesday by the International Astronomical Union (IAU) regarding the definition of the term "planet" would retain Pluto as a planet while including...

Loral to build second TerreStar satellite
Posted: Wed, Aug 16 7:27 AM ET (1127 GMT)
Space Systems/Loral (SS/L) announced Tuesday that it has won a contract to build a second satellite for a mobile satellite communications company. SS/...