Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Some astrophysicists propose time will end in 5 billion years with an event no creature alive will witness.
Physicists have calculated that time is likely to end within the next 4 billion years due to a catastrophe that no one alive at the time will witness.
100 years may be the cutoff time to find alien transmissions if they make similar technological progressions to ours.
As the bright stars of summer disappear in the west, the brighter stars of winter will rise in the east and make for a great stargazing season.
The bill continues to fund the shuttle program for a year, which will allow one last space shuttle mission following the mission planned for February.
The space station is expected to offer medical experiments, Earth observations and space tourism.
Video: Former U.S. Air Force personnel claim they experienced UFO activity near nuclear sites at which they worked.
The footage is considered some of the best of the historic 1969 moonwalk, but the film was lost in archives for years and was badly damaged when found.
First contact will be made by Malaysian astrophysicist.
Scientists propose creating synthetic organisms that use the resources available in the solar system to make supplies astronauts would need to survive on another planet.
'Coreshine' might reveal clues about how planets develop, say scientists.
Second problem in three months with docking or undocking Russian craft at the space station.
'Equinox,' which is Latin for 'equal night,' is a convenient oversimplification.
Discovery will launch Nov. 1, one of three remaining shuttle launches for NASA.
New Web-based observatory goes live to broadcast real-time views of eye-catching aurora borealis.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.