| 释义 |
Oort cloud 英ɔːt, əʊrt美ɔrt, ortAHDôrt, ōrt 短语¹⁴⁴⁹⁷²⁺²
基本英英
🌏奥尔特云；欧特云；奥特云
Noun:
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 |