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| 单词 | Kuiper belt object |
| 释义 | Kuiper belt object n. Abbr. KBO Any of the small icy bodies orbiting the sun in the Kuiper belt, generally having a diameter less than Pluto's. Pluto is a large Kuiper belt object that was probably captured in its present solar orbit by an encounter with the planet Neptune. [After Gerard Kuiper (1905-1973), Dutch-born American astronomer who speculated about the existence of such bodies.] |
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