释义 |
Oort cloud/ɔ:t, ʊət/n. Astron. a cloud of small rocky and icy bodies thought to orbit the sun beyond the orbit of Pluto, acting as a reservoir of comets 【天】奥尔特云(一种由小块岩石和冰构成的云体,被认为在冥王星轨道的外围绕着太阳运行,是彗星的聚集区域) [named after J.H. Oort, Dutch astronomer d. 1992] |