| 单词 | Kuiper belt | 
| 释义 | Kui·per belt    (kīpər)n.  A disk-shaped region in the outer solar system lying beyond the orbit of Neptune and extending to a distance of about 50 astronomical units, containing thousands of small icy bodies, some of which are on highly elliptical orbits, periodically visiting the inner solar system as comets. [After Gerard   Kuiper (1905-1973), Dutch-born American astronomer who speculated about the existence of such a region.]  | 
	
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