Venus will cross the face of the sun for the last time until 2117. Here's what it will look like.
SETI hunter Jill Tarter says Sir Stephen Hawking is wrong about aliens coming to attack or colonize Earth. If aliens can get here, Tarter reasons, they'll be advanced enough not to need slaves, food or other planets,
A Russian Soyuz rocket, with three astronauts aboard, is due at the International Space Station Thursday. On Saturday, the SpaceX 'Dragon' will follow.
The humongous asteroid Vesta is actually a protoplanet left over from the early days of our solar system, new observations from a NASA space probe suggest.
A huge sunspot spanning more than 60,000 miles could erupt, sending high energy radiation into space.
From asteroid mining to space station taxis, a handful of billionaires have big plans for the final frontier.
A new company backed by some of the world's most prominent billionaires, including three Google executives, plans to mine near-Earth asteroids for precious metals.
Funding for the Kepler mission, which has discovered more than 2,300 potential alien planets to date, was slated to run out this November.
New information collected by NASA's Messenger shows that Mercury was more geologically active than scientists previously thought.
The five-rocket salvo, which is scheduled to launch Sunday night from NASA's Wallops Flight Facility in Virginia, forms the core of the agency's Anomalous Transport Rocket Experiment, or ATREX.