Astronomers find a new type of planet: The 'mega-Earth'
Boston MA (SPX) Jun 03, 2014 - Astronomers have discovered a new type of planet - a rocky world weighing 17 times as much as Earth. Theorists believed such a world couldn't form because anything so hefty would grab hydrogen gas as it grew and become a Jupiter-like gas giant. This planet, though, is all solids and much bigger than previously discovered "super-Earths," making it a "mega-Earth." "We were very surprised whe ... more
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