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Astronomers have made a crude thermal map of an extrasolar world they cannot yet see, confirming that violent winds rapidly whip around the planet.
Evidence that plant life was a primary force that shaped Earth's surface is laid out in a new issue of Nature Geoscience. Because of that, the chance we'll find a similar world with a surface like our planet's is very small.
The findings lend support to the hope that somewhere up in the night sky is an Earth-like world.
Jill Tarter, who was the inspiration for Jodie Foster's character in "Contact," will lead the SETI Institute's fundraising. She talked to CNET about the alien hunt, and what she'd say to them.
To celebrate the previous 1,000 days of the NASA Spitzer space telescope, astronomers release their top 10 most dramatic images captured by the infrared camera on board.
Astronomers at the ESO in Europe conclude that there are tens of billions of rocky planets in potentially habitable zones in our galaxy.
Bringing to mind the fictional world Tatooine in the Star Wars saga, a NASA spacecraft has discovered a Saturn-size world 200 light years from Earth that orbits two stars, a first in the search for exoplanets.
Gliese 581g is just the right distance from its host star to enjoy temperatures hospitable to water in liquid form--and thus be hospitable to life, researchers say.
After less than a year in operation, NASA's Kepler space telescope finds five new exoplanets in our galaxy. Unfortunately, none of them is habitable.