Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Video: Former astronauts Neil Armstrong, James Lovell and Gene Cernan urge President Obama to reconsider what they warn could be 'devastating' new policies for the future of NASA.
Previously unknown comet recorded by the Solar and Heliospheric Observatory that watches the sun.
Assembly and test preparation have begun on a probe scheduled to visit our system's largest planet.
Obama administration grants $2.4 billion over 5 years to help scientists investigate Earth-bound problems, including climate change.
Scientists explore response options if aliens ever make first contact.
Commercial company Orbital Sciences is building a new transport vehicle for the space station.
Scientist declares Star Trek's favored speed of transport deadly to humans.
British man used cheap digital camera, duct tape and a helium balloon to take photos that would have cost NASA millions.
New software uploaded into Opportunity allows rover to make its own decisions.
American millionaire Richard Garriott owns a Soviet space rover parked on the moon, and he claims this could give him rights to lunar property.
New weather map shows secrets of the planet’s giant storm.
This is the first planet discovered outside our solar system that resembles planets within our system.
Baumgartner will jump from a helium balloon in the stratosphere about 120,000 feet above Earth.
Discovery weakens theory that water may have existed on the Red Planet.
Video: Narrated by Leonardo DiCaprio, new film journeys to space to document the adventure to fix the world's most famous telescope.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.