Scientists Estimate 20 Billion Earth-Like Planets In Our Galaxy

A team of astronomers crunching data from the Kepler space telescope say 22 percent of Sun-like stars harbor Earth-like planets.

Source: http://www.npr.org/blogs/thetwo-way/2013/11/04/243062655/scientists-estimate-20-billion-earth-like-planets-in-our-galaxy?ft=1&f=1007

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