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Space

Star systems full of planetary smash-ups are bad news for alien life

By Leah Crane

12 November 2019

Planets colliding

That’s going to leave a mark

NASA/JPL-Caltech

IT IS a dangerous universe out there. 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 …

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