Oort Cloud

Definitions

1. The Solar System's Oort cloud, extending from 50,000 to 100,000 astronomical units (approximately 1 light year) from the sun; supposedly the source of most comets around the Solar System.
2. Alternative letter-case form of Oort Cloud (“the Solar System's Oort cloud”).
   alt-of
3. A roughly spherical region of space composed of comet-like bodies and other minor planets and asteroids that orbit distantly in a planetary system.

Equivalents

CEFR level