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| Kui·per belt [ kpər belt ] |
noun |
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| Definition: |
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ring of orbiting celestial bodies: a ring of small astronomical objects orbiting through the outer solar system, beyond the farthest planets, Neptune and Pluto. It is believed that the Kuiper belt is a source of comets.
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| [After Gerald Peter (Gerrit Pieter) Kuiper (1905-1973), Dutch-born U.S. astronomer] |
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