Alien Earths: why life on other worlds would be far weirder than us
Last month, the American Astronomical Society's 223rd meeting featured the announcement of a few breakthroughs: Using the Kepler space observatory, researchers had discovered a planet roughly the mass of Earth orbiting a star beyond our solar system, and with the Hubble telescope they had provided the first detailed look at the weather of a "super Earth" — a planet larger than ours but smaller than Neptune — in our galactic neighborhood.
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