- Dictionary
- 51Թ comparison: Oort cloud vs. Kuiper belt
Oort cloud vs. Kuiper belt
noun
Astronomy.
- a region of our solar system far beyond the orbit of Pluto, in which billions of comets move in nearly circular orbits unless one is pulled into a highly eccentric elliptical orbit by a passing star.
noun
Astronomy.
- a disk-shaped region on the edge of the solar system that contains masses of ice and icy rock, believed to be the source of comets with orbital periods of less than 200 years.