Scientists measure speed of gravity
Posted: Sat, Jan 11 11:15 AM ET (1615 GMT)
The first effort to measure the speed of gravity has led astronomers to conclude that gravity operates at the speed of light, as predicted by...

NASA confident Columbia will be ready for launch
Posted: Fri, Jan 10 7:40 AM ET (1240 GMT)
Shuttle managers said Thursday that they believe the space shuttle Columbia will be cleared for launch next week even though an issue with cracked bearings...

New images offer views of early universe
Posted: Fri, Jan 10 7:29 AM ET (1229 GMT)
Astronomers released this week new images that offer the best glimpses yet of conditions in the early universe. In one study, astronomers used images from...

New model explains lunar magnetism
Posted: Thu, Jan 9 8:37 AM ET (1337 GMT)
A "burp" of hot rock nearly four billion years ago may explain why the Moon once had a weak magnetic field. In a paper published...

Satellite radio companies announce subscribers, new features
Posted: Thu, Jan 9 7:25 AM ET (1225 GMT)
The two leading satellite radio companies announced updated subscriber numbers and new features on Wednesday. XM Satellite Radio, the largest satellite radio company in the...

DirecTV subsidiary considers bankruptcy
Posted: Thu, Jan 9 7:14 AM ET (1214 GMT)
The Latin American subsidiary of satellite TV broadcaster DirecTV said Wednesday that it may restructure or even file for bankruptcy protection. DirecTV Latin America officials...

Astronaut replaces cosmonaut for ISS spacewalk
Posted: Wed, Jan 8 9:04 AM ET (1404 GMT)
A rookie astronaut will replace a veteran cosmonaut on an International Space Station spacewalk later this month, NASA announced Tuesday. The agency said that Don...

Most distant exoplanet discovered
Posted: Wed, Jan 8 7:47 AM ET (1247 GMT)
Astronomers announced Monday that they used a different technique to discover the most distant exoplanet found to date. Astronomers from the Harvard-Smithsonian Center for...

Board: main engine responsible for Ariane 5 failure
Posted: Tue, Jan 7 10:23 AM ET (1523 GMT)
An inquiry board has concluded that the failure of a main engine cooling system led to the loss of an Ariane 5 launched last month,...

Ring of stars circles Milky Way
Posted: Tue, Jan 7 9:04 AM ET (1404 GMT)
Astronomers announced Monday that they have discovered a ring of stars of unknown origin circling our galaxy. Using data from the Sloan Digital Sky Survey,...