The discovery of a trove of potential alien planets, including dozens that could be Earth-size or habitable, is heartening news for those hoping to discover E.T. one day.
NASA's Kepler Space Telescope found 1,235 planet candidates beyond our solar system, according to an announcement Wednesday (Feb. 2). Of those, 68 are thought to be about the size of Earth, and 54 are at a distance from their stars where liquid water should be able to exist.
However, none of those planets are actually confirmed to exist — they are merely potential planets that must be verified with follow-up studies. Furthermore, none of them are guaranteed to be habitable — scientists know only that there is a chance they are, based on the picture we have now.
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