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dust tail
dust tailn. 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. MedicalSeeCOMETThesaurusSeecomet |