ESOcast 150 Light: Planets around TRAPPIST-1 Probably Rich in Water from www hd video com hold Watch Video
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Description: A new study has found that the seven planets orbiting the nearby ultra-cool dwarf star TRAPPIST-1 are all made mostly of rock, and some could potentially hold more water than Earth. The planets' densities, now known much more precisely than before, suggest that some of them could have up to 5 percent of their mass in the form of water — about 250 times more than Earth's oceans.nnThis ESOcast takes a quick look at this important result.nnMore information and download options: http://www.eso.org
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