Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Volcanoes may have played a large role in Mercury's formation, including its crater-covered landscape and sulfur-rich ground.
Newfound planets are gassy planets of varying mass.
Astronomers have detected faint X-ray signals that they believe were emitted by giant black holes billions of years ago when the universe was young.
Paired stars are discovered when the brightness of one is lessened as its counterpart passes in front of it.
While the eclipse won't be visible in North America, many sources will be streaming the event on the Web.
Scientists thought the Sun would move into solar maximum in 2012, but lately a curious calm has suggested quite the opposite.
Those candidates asked about NASA's future agree that private enterprise is the future of space flight.
Less than six weeks after the safe landing of the space shuttle Endeavour, NASA is scheduled to launch Atlantis on its own final mission, and the very last of the shuttle program. Here's a look at the major milestones that have been completed.
Large 'rubble pile' has enough gravity to maintain satellites.
Project meant to study how human beings cope with the stress of confinement and flight in space for long stretches of time.
The eclipse will last for nearly six hours, but won't be viewable from North America.
Phone will launch with a SpaceLab app to aid astronauts with experiments. Earth-bound iPhone users can download the app for 99 cents.
The CALIPSO satellite observes how clouds and particles affect Earth's climate.
The Dawn spacecraft launched in 1997 and is just now reaching Vesta, a small protoplanet in the asteroid belt between Mars and Jupiter.
Asteroid samples from a frozen lake showed variable types of amino acids and other chemicals that may have influenced the formation of life on Earth.
Eco-entrepreneur on politics, energy and Earth's resources.
Russell blogs about the day's top science and eco-news.