Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Asteroid splashdown could release chemicals and elements into the atmosphere that would damage the ozone layer.
Enjoy this countdown of the top 10 ways living in space can be "scary."
NASA has tracked nearly 7,000 near-Earth objects that are more than several feet across, and 1,157 are considered "potentially hazardous asteroids."
He'll be helping astronauts clean and make repairs in space.
Scientists believe almost 25% of all sun-like stars might have a planet roughly the size of Earth orbiting them.
Using observations from the Hubble Space Telescope, scientists have calculated how stars will move for the next millennia.
Suborbital flights to be offered within nine to 18 months.
Late October skies offer great stargazing opportunities.
NASA's Spitzer Space Telescope discovered the carbon spheres around three dying sun-like stars in the Milky Way and in the space between stars.
Shuttles earn their weathering mainly from the searing heat of re-entry.
China had already announced plans to launch two unmanned modules next year, an essential step toward building the space station.
Spacecraft will use its telescopes and other instruments to examine the surface and record gas outbursts.
Robot will complete chores and repairs aboard the International Space Station.
Launch will be shuttle's last as NASA refocuses on deep-space exploration.
Particles created by rockets for space visits remain in atmosphere for years.
Eco-entrepreneur on politics, energy and Earth's resources.
Russell blogs about the day's top science and eco-news.