Home US English Oort cloud

Definition of Oort cloud in English:

Oort cloud

proper noun

Astronomy

  • A spherical cloud of small rocky and icy bodies postulated to orbit the sun beyond the orbit of Pluto and up to 1.5 light years from the sun, and to be the source of comets. Its existence was proposed by J. H. Oort.

Pronunciation

Oort cloud

/ôrt kloud/ /ɔrt klaʊd/