In this space wallpaper, NASA's Kepler mission has discovered the first Earth-size planets orbiting a sun-like star outside our solar system.The planets, called Kepler-20e and Kepler-20f, are too ...

Although Kepler 22-b, discovered earlier this year by NASA’s planet-hunting telescope, is like a temperature twin to Earth, a new announcement today reveals two exoplanets that are Earth-like in size.

The first two Earth-like worlds orbiting another star have been detected, although neither are believed to be suitable for life. But if the planets had water in the past, there's a good chance they ...

This story was updated at 2:40 EST. Astronomers on Tuesday (Dec. 20) announced the discovery of the first two Earth-size alien planets — a historic find for sure, but the newfound worlds didn't ...

NASA’s Kepler mission has found the first Earth-size planets orbiting a sunlike star outside our solar system. But they’re too hot to support liquid water — or life. This latest discovery marks a ...

NASA’s Kepler mission has discovered the first Earth-sized planets orbiting a Sun-like star outside our solar system. The planets, called Kepler-20e and Kepler-20f, are too close to their star to be ...

NASA, like we've been reporting, has been throwing some fabulous discoveries with its Kepler mission. On its last quest, Kepler managed to dish out a planet called Kepler-22b, which reportedly is ...

NASA's Kepler mission has discovered the first Earth-size planets orbiting a sun-like star outside our solar system. The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in ...

A rocky planet the same size as the Earth has been discovered orbiting a star like our sun. It is the first time a planet of this size has been detected in another solar system. Scientists have hailed ...

[Photo: NASA/Ames/JPL-Caltech] The Kepler space telescope must be NASA’s most prized possession right now. A few weeks ago, it found several possibly habitable planets in distant solar systems; now it ...

Other distant planets found before have been too large for possible life. Dec. 20, 2011 — -- NASA's Kepler space telescope has found two new planets orbiting a distant sun-like star, and the ...

Just two weeks after the confirmation of a planet that's within the habitable zone of a distant star, the Kepler team is back with the discovery of two Earth-sized planets orbiting in what is now a ...