Kuiper belt

The Kuiper belt, occasionally called the Edgeworth–Kuiper belt, is a circumstellar disc in the outer Solar System, extending from the orbit of Neptune to approximately 50 AU from the Sun. It is similar to the asteroid belt, but is far larger—20 times as wide and 20 to 200 times as massive.

Kuiper Belt

The Kuiper belt is a HUGE region of space beyond Neptune.

The Kuiper Belt shouldn't be confused with the Oort Cloud, which is an even more distant.