Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Part of Obama's mission to reach Mars is preventing asteroids from hitting our planet.
New space exploration plans include landing on an asteroid and the red planet.
Video: President Obama lays out his vision for the future of NASA and for maintaining U.S. leadership in human space flight in remarks at John F. Kennedy Space Center.
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.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.