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US Space Telescope Spots 715 More Planets

Scientists added a record 715 additional planets to the list of known worlds beyond the solar system, boosting the overall tally to nearly 1,700, astronomers said on Wednesday. The additions include four planets about 2.5 times as big as Earth that are the right distance from their parent stars for liquid surface water, which is believed to be key for life. The discoveries were made with the National Aeronautics and Space Administration's planet-hunting Kepler space telescope...

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