In Search of Earth 2.0, discovery of Kepler-452b - YouTube - 0 views
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dudayev on 05 Feb 16NASA's Kepler spacecraft is a prolific hunter of planets outside of our Solar System. Since it launched in 2009, Kepler has confirmed more than 1000 of these exoplanets and catalogued thousands of more candidates. The menagerie includes planets with densities greater than iron and lower than Styrofoam; planets smaller than Mercury and bigger than Jupiter; planets with one sun, two suns, and even four suns!