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Ten Billion Earths

At least one in ten stars are orbited by an Earth-sized planet, according to data taken by NASA’s Kepler spacecraft. 
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At least one in ten stars are orbited by an Earth-sized planet, according to data taken by NASA’s Kepler spacecraft. So that means the Milky Way Galaxy has more than ten billion planets that are equivalent to Earth.

Illustration Credit: NASA, F. Fressin (Harvard CfA)

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