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Kuiper Belt
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Kuiper Belt:

A disk-shaped region in the outer solar system lying beyond the orbit of Neptune containing thousands of small icy bodies, a few of which are considered “dwarf planets” because they orbit the sun, and others which periodically visit the inner solar system as comets. Named after Dutch-born American astronomer Gerard Kuiper (1905-1973) who first speculated that there was such a region in our solar system.