最終更新日：2023/05/09
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(astronomy) A comet: a celestial body consisting mainly of ice, dust and gas in an orbit around the Sun and having a tail
of matter blown back from it by the solar wind.
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noun
(astronomy) A comet: a celestial body consisting mainly of ice, dust and gas in an orbit around the Sun and having a "tail" of matter blown back from it by the solar wind.
