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Oort cloud AHD[ôrt, ōrt] D.J.[ɔːt, əʊrt]K.K.[ɔrt, ort]n.（名词）- A swarm of comets orbiting the sun at a distance of one to two light-years, proposed as a source of comets that pass near the sun.奥尔特云：在离太阳一至二光年距离的彗星云，被认为是在太阳附近经过的彗星的来源地
- After Jan Hendrix Oort (born 1900), Dutch astronomer 源自詹·亨迪斯 奥尔特 （生于1900年），荷兰天文学家
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