Planets similar to Earth may be more common and closer at hand than previously thought, according to an analysis of data from NASA's Kepler telescope that found red dwarf stars could support habitable planets. Scientists at the Harvard-Smithsonian Center for Astrophysics determined that 6% of the 75 billion red dwarf stars they studied may have Earth-like planets orbiting them, some of which could be as close as 13 light-years away.

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