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 exoplanets beyond the reaches of our sun, it is not our best bet for recognizing an Earth-twin circling a distant star.
In order to understand what an Earth-twin candidate really looks like, it takes a more refined approach than what Kepler can provide, at the moment.
?It?s a statistical mission,? astronomer Natalie…
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