https://news.harvard.edu/gazette/story/newsplus/interstellar-comets-like-borisov-may-not-be-all-that-rare/
Interstellar comets like Borisov may not be all that rare — Harvard Gazette
In 2019, astronomers spotted something incredible in our backyard: a rogue comet from another star system. Named Borisov, the icy snowball traveled 110,000...
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