Kepler-22b

NASA has announced its Kepler planet-hunting spacecraft has confirmed the discovery of a planet in the habitable zone of its star-- which happens to be a star similar to our Sun. That means the world, dubbed Kepler-22b, could support life. It has a radius 2.4 times larger than Earth, and, depending on how its atmosphere works, the average temperature on Kepler-22b could be a balmy 72 degrees F.

NASA also announced Kepler has found another 1,000 candidate planets, which pushes Kepler's overall total to over 2,300. Of those, 207 are approximately the size of Earth, and dozens are in their star's habitable zone.