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Did you know that comets spin? Our Swift telescope has been watching comet 41P/Tuttle-Giacobini-Kresák - 41P for short - and it’s suddenly spinning slower and slower. In fact, it’s slowing down more dramatically than any comet observed before. What’s causing this spindown? It might be due to the sunlight-activated jets that cover more than half of 41P’s surface, along with the comet's shape and small size. The comet is expected to keep slowing down, which may make its rotation unstable - and its
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