Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Company will continue to work on a suborbital vehicle but will also develop an orbital space capsule that will launch on an expendable Atlas 5 rocket, then transition to a reusable booster.
Rover reaches the Endeavour crater after traveling since August 2008.
The space agency held ceremonies at its various centers around the country where the space shuttle program was carried out before its retirement.
Video: A university student makes an astronomical discovery so grand she may have an asteroid named for her.
NASA's space debris programs consist of a single staff member.
Proposed roadmap recommends developing plans to go directly to Mars or launching a manned mission to an asteroid.
The cost and logistics of paying for, and covering up, a secret mission into space would prove incredibly difficult.
The Jupiter-bound spacecraft is the first solar-powered one to head for the gas giant.
Russia delayed its next manned spacecraft mission to the ISS after an unmanned cargo vessel crashed instead of reaching orbit on August 24.
NASA will have to pore over the captured images to determine where the meteor eventually faded out in Georgia.
While most space energy needs are met with solar technology, sunlight may not always be available to astronauts in space, resulting in a portable nuclear source.
De-manning the International Space Station runs the risk of NASA being unable to repair the space laboratory in the event of an emergency.
Problems with Russian rockets mean the new crew may not arrive before the current crew leaves — putting a hole in the amount of scientific research being done.
Modern man may have problems on Earth, but in low-Earth orbit, we have achieved a spirit of cooperation perhaps unprecedented in human history. Check out 10 awe-inspiring images from the International Space Station.
Astronaut also advocates a return to the moon, traveling to Mars.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.