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Alien Planet Quiz: Are You an Exoplanet Expert?

SPACE.com Staff
Date: 31 July 2012 Time: 04:00 AM ET
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Astronomers have confirmed more than 700 planets beyond our own solar system, and the discoveries keep rolling in. How much do you know about these exotic worlds?
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An artist's conception shows the newfound alien planet Kepler-36c as it might look from the surface of Kepler-36b.
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