How big is kepler-22b?
Kepler-22b is the first extrasolar planet confirmed by NASA's Kepler Space Telescope to orbit in the habitable zone of a Sun-like star. The discovery was announced December 5, 2011. The planet's radius is roughly 2.4 times the radius of Earth; it is 600 light years away from Earth, in orbit around the G-type star Kepler 22.
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