Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
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.
The layoffs, which take effect October 1, involve 902 workers in Florida, 478 in Texas and 14 in Alabama.
The star, which is brighter than the Sun, has doubled the previously accepted limit of solar mass.
Video: Astronomers use infrared "eyes" to shed light on these enigmatic cosmic structures.
Inventors hope to market their suit, which includes a roomy helmet and dexterous gloves, to private firms.
Lasers fired from the ground can locate and track debris as small as 4 inches across, protecting astronauts and satellites.
Respected scientist redefines gravity -- and possibly the way we see the universe.
Ninety-five asteroids are considered "near Earth," but none poses any threat to Earth anytime soon.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.