A PHP Error was encountered

Severity: Notice

Message: Only variable references should be returned by reference

Filename: core/Common.php

Line Number: 257

Space - Kuiper-belt

Kuiper Belt

A region in our outer solar system beyond Neptune where many short-period comets originate. Short-period comets take less than 200 years to complete an orbit of the Sun. Pluto is one object that occupies the Kuiper belt.