Definitions | Oort cloud |
| noun
- (astronomy) A roughly spherical region of space from 50,000 to 100,000 astronomical units (approximately 1 light year) from the sun; supposedly the source of most comets.
Translations: - Dutch: Oortwolk
- German: Oortsche Wolke
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Etymology: Named after w:Jan Oort, Jan Oort.
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