+ - Earth-Sized Exoplanets Orbit 17% of Stars in the Milky Way->
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astroengine
astroengine writes "Four years ago, NASA launched the Kepler space telescope in an attempt to learn just how common Earth-sized worlds are in the Milky Way galaxy. On Monday, scientists unveiled part of the answer: About 17 percent — one in six — of Kepler's target stars have Earth-sized worlds orbiting closer to their parent stars than where Mercury orbits the sun."
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Earth-Sized Exoplanets Orbit 17% of Stars in the Milky Way More Login
Earth-Sized Exoplanets Orbit 17% of Stars in the Milky Way