NASA/JPL-Caltech
IT IS a dangerous universe outthere. Astronomers have spotted the aftermath of an enormous collision between two distant planets, and their studies indicate that such violence could ruin the chances for life on planets that could otherwise be similar to Earth.
Almost 400 light years away, two nearly identical dwarf stars orbit one another. Around those stars sits a strange disc of dust. That dust is far warmer than it ought to be, given that we would have expected it to have cooled in the past billion years since the star system …
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