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单词 dust tail
释义

dust tail


dust tail

n. A relatively wide, often flaring and curved, illuminated tail composed of dust that is forced away from a comet's nucleus by solar radiation pressure.

dust tail


dust tail

See comet tails.

dust tail

[′dəst ‚tāl] (astronomy) A comet tail that consists of particles, typically 1 micrometer in diameter and primarily silicate in composition, and is usually curved with a length in the range from 106 to 107 kilometers.
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更新时间:2024/12/23 14:10:32