Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Rocket was to deliver Russian GPS satellites into space.
NASA planning to contract SpaceX for cargo transport into space by the end of 2011.
Delay allows engineers more time to complete work to analyze why small cracks developed in the shuttle's huge external fuel tank.
The military is planning a second plane slated for a 2011 launch.
Video: For the last 24 hours, speculation that NASA might announce that ET has finally phoned home went viral.
Groundbreaking discovery changes search for alien life.
Stern calls definition of a planet 'sloppy' and 'nonsensical.'
After NASA announced plans for a briefing, the Internet exploded with speculation that alien life had been discovered.
The super-Earth, discovered in 2009, is larger than the Earth we live on but smaller than planets such as Jupiter and Saturn.
Jupiter is the largest planet in our solar system and fifth from the sun. Thanks to several missions by NASA, we're able to see our biggest neighbor as never before.
Research suggests the UFO sightings over Australia were most likely meteors and ball lightning.
The vehicle, known as the Orbital Test Vehicle or X-37B, is expected to land at Vandenberg Air Force Base in California between Friday and Monday.
Presence of such galaxies may signify fertile star-forming regions.
Angeles Duran, who lives in the town of Salvaterra do Mino, registered the star at a local notary public as being her property.
NASA hopes to use commercial flights to send astronauts into space.
Eco-entrepreneur on politics, energy and Earth's resources.
Russell blogs about the day's top science and eco-news.