How will a private Mars mission in 2018 work?
Astrophotographer Chad Blakley captured three amazing videos of northern lights over Sweden's Abisko National Park.
The first results from the AMS experiment on the International Space Station are expected in about two weeks.
Famed actor William Shatner, TV's Captain Kirk, called astronaut Chris Hadfield on the International Space Station.
This cool space wallpaper reveals the space shuttle Discovery is more complex, cramped, and altogether more awesome from the inside than imagined.
Saul Perlmutter won the 2011 Nobel physics prize for helping discover that the universe's expansion was accelerating.
The EBEX project searched for a never-before-seen pattern in the light left over after the birth of the universe.
Just a week ago, Iran launched a monkey to space. Now, the country is looking toward launching humans.
Future spaceflight accidents may not be inevitable, but they're not entirely preventable either, experts say.