“Oort cloud”的概念、定义、翻译、参考文献-科学参考

单词	Oort cloud
释义	Oort cloud Encyclopedia 理学哈雷彗星释 Oort cloud奥尔特云 1950年，荷兰天文学家J.H.奥尔特根据长周期彗星的轨道特征，认为在离太阳2000～200000个天文单位（AU）处有一个笼罩太阳系的球状包层，其中分布以千亿计的小天体，那里是长周期彗星和哈雷族彗星的诞生地。 Astronomy Oort cloud奥尔特云
随便看	ground state depletion microscope ground state energy ground state of atom ground state rotational band ground state spontaneous fission ground-state spontaneous fission ground station ground-structure method ground subsidence induced by dewatering of foundation pit engineering ground subsidence survey ground substance ground support equipment ground support vehicle ground tea ground term ground test and launch control system ground test for separation system under thermal circumstance ground test of airborne weapon fire control system ground timing system ground tissue ground treatment ground treatment in mountain area ground trial ground vibration test for stores installed on aircraft groundwater

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