A possible Earth twin has been confirmed orbiting a sunlike star 600 light-years away—and the new planet may be in just the right spot for supporting life, NASA announced Monday.
Discovered by the Kepler space mission, the new planet—dubbed Kepler-22b—is the first world smaller than Neptune to be found in middle of its star's habitable zone.
Also called the Goldilocks zone, the habitable zone is the region around a star where a planet's surface is not too hot and not too cold for liquid water—and thus life as we know it—to exist .... Read more at http://news.nationalgeographic.com
