Two Planets of Kepler-47

Two Planets of Kepler-47
August 27, 2012
CreditNASA/JPL-Caltech/T. Pyle
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The two planets of Kepler-47, the first transiting circumbinary system -- a system with more than one planet orbiting a pair of stars. Kepler-47b, on the right, has three times the radius of earth and orbits the pair of stars in less than 50 days while Kepler-47c is thought to be a gaseous giant, slightly larger than Neptune with an orbital period of 303 days.