Close encounters
| dcterms modified |   |
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| broader |
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| definition | In a star cluster, coming across of two stars so closely that their orbits alter by their mutual gravitational attractions. As regards an asteroid or comet, a situation when it crosses the Moon's orbit and approaches the Earth with a risk of collision. | ||||||
| narrower |
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| related |
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| type |
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| contributor | AAS_Frey.Katie original | ||||||