Kuiper belt - Wikipedia
The Kuiper belt (/ ˈ k aɪ p ər, ˈ k ʊ ɪ-/), occasionally called the Edgeworth–Kuiper belt, is a circumstellar disc in the outer Solar System, extending from the orbit of Neptune (at 30 AU) to approximately 50 AU from the Sun. It is similar to the asteroid belt, but is far larger – 20 times as wide and 20–200 times as massive. Like the asteroid belt, it consists mainly of small ...
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