Milky Way could be home to 4.5 billion Earth-like planets

Astronomers have calculated that 6 percent of our galaxy’s most common type of star probably host temperate, Earth-sized planets, meaning that a habitable alien Earth could be just a dozen light years away.

By Mike Wall, SPACE.com / February 6, 2013

http://www.csmonitor.com/Science/2013/0206/Milky-Way-could-be-home-to-4.5-billion-Earth-like-planets#.UR0B9Qot3Po.mailto