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Kuiper Belt

Beyond Neptune in a distance of 30 - 50 AU stretches another band of asteroids and comets, the Kuiper belt. Probably there are more objects in it as in the asteroid belt between Mars and Jupiter, but these are harder to discover.
From time to time comets are thrown from there in direction of the Sun and become short periodic comets like Halley.
The orbit of Pluto is partly within the Kuiper belt.

Dwarf planet Eris orbits completely in the Kuiper belt.

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    Kuiper Belt
Graphic: Nasa

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