NASA finds Earth-size planet candidates in habitable zone, six planet system

Wednesday, February 2, 2011 - 14:31 in Astronomy & Space

NASA's Kepler mission has discovered its first Earth-size planet candidates and its first candidates in the habitable zone, a region where liquid water could exist on a planet's surface. Five of the potential planets are near Earth-size and orbit in the habitable zone of smaller, cooler stars than our sun.

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