VariousWords beta
Related Terms:
Definitions:
Noun
Oort cloud
Definition: (astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto; perturbations (as by other stars) can upset a comet's orbit and may send it tumbling toward the sun
Definition: A roughly spherical region of space composed of comet-like bodies and other minor planets and asteroids that orbit distantly in planetary systems