Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Video: MSNBC's Chris Jansing talks with NASA astronauts Mark and Scott Kelly, who will become the first identical twins in space at the same time.
Long-term space flight so weakens fitness that an astronaut going to Mars may lose up to half the power in key muscles in the course of the mission.
Senator Bill Nelson's legislation would give tax breaks to those who invest in space ventures to offset job losses from the end of the shuttle program.
Experts think Van Gogh and Bach would be more appealing than Newton or Einstein.
The International Space Station has been operating on half its normal cooling capability since the pump failed July 31.
Robonaut 2 is scheduled to arrive at the International Space Station in November, fields Twitter questions in the meantime.
Previous spacewalk bid to restore full cooling to orbiting lab had been thwarted by large ammonia leak.
The mission, which sounds like the theme of 'Deep Impact', would take off in 2106 to take samples of the dangerous asteroid.
Stephen Hawking says mankind faces an increasing number of events that threaten its very existence and must colonize space to survive.
Scientists explore how moon dirt could feed plants in future space station greenhouses.
Reports given to Churchill claimed that a reconnaissance aircraft returning to Britain from a mission was shadowed by a UFO as it crossed the coast.
Scientists said residents of northern regions — from Maine to Michigan and anywhere farther north — may see unusual northern lights.
Officials stressed that the six occupants were in no danger, and that the orbiting complex was in a stable situation.
These giant exoplanets are closer together and more tightly bound than any previously discovered planets.
The space agency pours cash and ideas into new innovations for cleaner airplanes.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.