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.

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 ...

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 ...

NASA’s star-gazing telescope Kepler has added to its amazing discoveries list by spying the first Earth-size planets orbiting a Sun-like star outside our solar system. NASA says while the planets are ...

CAMBRIDGE, Mass., Dec. 20 (UPI) -- NASA says its Kepler space telescope has discovered the first Earth-size planets orbiting a sun-like star outside our solar system. While the planets, called ...

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 ...

This story was updated at 1:54 p.m. ET. Two planets orbiting a star 950 light-years from Earth are the smallest, most Earth-size alien worlds known, astronomers announced today (Dec. 20). One of the ...

NASA, like we've been reporting has been throwing some fabulous discoveries with its Kepler mission. For those ... Advisory Alert: It has come to our attention that certain individuals are ...

[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 ...

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 ...