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The comet that came in from interstellar space

The William Herschel Telescope WHT, Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain.

Researchers have used the William Herschel Telescope in the Canary Islands to study a comet hailing from beyond the reaches of the Solar System. Credit: Javier Larrea/Alamy

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Nature 574, 456 (2019)




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