Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
A small asteroid zooming by Earth this week has been caught "winking" as it spins in a new video recorded by an amateur astronomer.
As the universe expands, the ability to see already far off stars and galaxies diminishes, leaving scientists with a deadline to figure out the cosmos.
Some are excited, but many are disappointed by retired space shuttle destinations.
A vintage Vostok space capsule is headed back to its homeland with its new Russian owner, who bought the relic for nearly $2.9 million during Sotheby's auction. It is believed to be the most anyone has ever paid for a space artifact.
Terje Sorgjerd spent a week above the Arctic Circle to video the super-charged aurora borealis.
Scientists have replicated the physics of the Big Bang by observing the way light moves through a special 'metamaterial,' with surprising results.
NASA hopes to ship the shuttles to their respective museums next year.
New shuttles need to be safer, more economical and have the latest technologies to be worthwhile.
Challenges of safety, funding and leadership all hold back manned Mars exploration.
Real-life 'X-Files' reveal policy of destroying documents related to UFO investigations because they would have taken up too much filing space.
A look back at NASA's ups and downs, and what the future holds for the space agency.
The question of where the shuttles will be displayed has prompted a flurry of speculation, as the locations are expected to see a surge in visitor traffic.
The White House congratulated Russia on the 50th anniversary of Gagarin's spaceflight, but noted tongue-in-cheek that America got to the Moon first.
Yuri Gagarin's legacy as the first man in space lives on in traditions and as statues.
Learn more about the blue-green planet that is four times as large as Earth and is covered by methane gas clouds.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.