Topic:astronomyuranology
Hypernyms:accumulation aggregation assemblage collection
Inherited Hypernyms:oort cloudcollectiongroupabstractionentity
| 单词 | oort cloud |
| 释义 | Oort Cloud nnoun.group(astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto; perturbations (as by other stars) can upset a comet's orbit and may send it tumbling toward the sun Topic:astronomyuranology Hypernyms:accumulation aggregation assemblage collection Inherited Hypernyms:oort cloudcollectiongroupabstractionentity |
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