Newly discovered two-planet system of Kepler-36

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12/26/2017 12:12 PM EST

Kepler-36c looms over neighbor, Kepler-36b

In this artist’s conception, a “hot Neptune” known as Kepler-36c looms in the sky of its neighbor, the rocky world Kepler-36b. The two planets have repeated close encounters, experiencing a conjunction every 97 days on average. At that time, they are separated by less than five Earth-moon …

This is an NSF Multimedia Gallery item.