The comet originated in the outer solar system and visits the inner solar system every 5.4 years. Astronomers have found archival data showing a one-of-a-kind event where a spinning comet appeared to reverse the direction of its rotation, NASA said in a news release. The comet, named 41P/Tuttle-Giacobini-Kresák, originated in the outer solar syst... [2201 chars]
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