Last Updated
：2025/12/06
near-Earth comet
（ plural ）
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(astronomy) a comet having a period of revolution shorter than 200 years and a perihelion distance smaller than 1.3 au
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near-Earth comet
Astronomers are closely monitoring a near-Earth comet that will pass within 0.05 astronomical units next month.
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Astronomers are closely monitoring a near-Earth comet that will pass within 0.05 astronomical units next month.
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