New study estimates billions of Earth-sized planets orbiting Sun-like stars in the Milky Way galaxy

Kepler-22b

Click Here to Read:  New study estimates billions of Earth-sized planets orbiting Sun-like stars in the Milky Way galaxy By Bryan Dyne on the World Socialist Web Site on November 9, 2013.

Artist’s conception of Kepler-22b, a planet 2.4 times the size of Earth orbiting in the habitable zone of a Sun-like star. Whether or not the planet has an atmosphere as depicted is unknown.