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How Will Scientists Confirm A New Earth?

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LONG BEACH, Calif. — The announcement this week that astronomers have found a potential alien world that could be the most Earth-like exoplanet yet is raising a big question: How will scientists confirm the existence of a true alien Earth?

While NASA's planet-hunting Kepler space telescope, which discovered the newfound Earth-like planet candidate KOI 172.2, is great for finding large numbers of exoplanets, it is not our best bet for characterizing an Earth twin circling a distant star, researchers say.

In order to understand what an "alien Earth" candidate really looks like, it takes a more refined approach than what Kepler can provide at the moment.

http://www.livescience.com/26192-alien-earth-size-planet-challenge.html

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