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Comets: structure, orbits, and effects

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Etymology and naming origins

The term “comet” has deep historical roots in European languages. It appears in the Anglo-Saxon Chronicle and is used by the Venerable Bede in 729 CE. The modern word derives from Old English “cometa,” which comes from Latin “comēta” (or “comētēs”).

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Physical characteristics: nucleus, coma, bow shock, tails, jets

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