Oort cloud
词源说明
A cloud-like structure, named after Dutch astronomer Jan Oort, who proposed it.
释义
专有名词proper noun
- 1Alternative letter-case form of Oort Cloud (“the Solar System's Oort cloud”).
名词noun
- 1(astronomy) A roughly spherical region of space composed of comet-like bodies and other minor planets and asteroids that orbit distantly in a planetary system.