Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
New study says the Greeks probably saw Halley's comet streak past in 466 B.C.
Hawking says he supports the continuation of human space exploration as opposed to robot exploration.
The ancient bacteria helped create a habitable Earth at least 2.5 billion years ago.
The two fireballs were likely caused by rogue asteroids or comets and more could be in Jupiter's future.
The double asteroid flyby may have caught the attention of the public, but these types of occurrences are actually quite common, NASA scientists say.
Undergraduates train with professionals in Colorado for at least 3 years to become satellite control certified.
Six volunteers simulate mission to Mars for 520 days.
Space shuttle Discovery was supposed to be moved from the hangar to the Vehicle Assembly Building in preparation for a fall liftoff.
The asteroids will zip past the planet on Wednesday and should be visible through a telescope.
Space station crews choose their days off together, before missions begin, but some chores cannot be ignored.
Canadian astronaut Chris Hadfield will perform scientific experiments, robotics tasks and technology demonstrations.
Hawking said the Big Bang is merely the consequence of the law of gravity.
Restoration to give students hands-on engineering experience.
Weather postpones liftoff of $63,400 prototype, financed mostly by 2,000 individual sponsors and 20 companies.
The infamous e-mail message has been widely circulated on the Internet since the summer of 2004.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.