Kepler discovers “Mega-Earth” in faraway star system

June 3, 2014 10:30 PM

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Astronomers surprised by rocky planet’s mass and age.

The Kepler space telescope, launched in 2009 to find exoplanets, has discovered a rocky planet with a mass 17 times that of Earth, orbiting a star in the constellation Draco 560 light years away.

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