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.
![](https://develop.bigthink.com/wp-content/uploads/2013/09/origin-245.jpg?w=480&h=270&crop=1)
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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)