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奥尔特云
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奥尔特云
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理学
哈雷彗星
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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
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human genetics
Human Genome Project
human genome project
human genome project, HGP
human geographical environment
human geographic photography
human geography
human granulocytic anaplasmosis,HGA
human guide
human habitat study
human hepatitis B immunoglobulin
human heritage law
human herpesvirus 6
human herpesvirus 7
human histology
human immumodeficiency virus genome
human immunodeficiency virus
human immunodeficiency virus-associated nephropathy
human immunodeficiency virus,HIV
human incentive
human infected highly pathogenic avian influenza
human influenza virus
Human Information Interaction: An Ecological Approach to Information Behavior
human information processing model
human-in-loop simulation
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