New Discoveries Open New Chapter for Cosmos

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New Discoveries Open New Chapter for Cosmos

New Discoveries Open New Chapter for Cosmos
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New Discoveries Open New Chapter for Cosmos

by WSJ Live 1:28 mins

Two new discoveries, a dwarf planet and rings around a distant asteroid, have scientists rethink their theories about the far rim of our solar system. WSJ's Robert Lee Hotz reports. (Photo: Scott S. Sheppard: Carnegie Institution for Science)

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