Galaxy May Be Full of 'Second Earths'

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Galaxy May Be Full of 'Second Earths' Earth-like planets may be surprisingly common in our part of the Milky Way, say astronomers from the Harvard-Smithsonian Center for Astrophysics. They looked at data from NASA's Kepler space telescope, and conclude that six percent of red dwarf stars -- the most common in the galaxy -- probably have Earth-like, habitable planets.

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