Extragalactic astronomy
volume
British pronunciation/ˌɛkstɹəɡɐlˈaktɪk ɐstɹˈɒnəmɪ/
American pronunciation/ˌɛkstɹəɡɐlˈæktɪk ɐstɹˈɑːnəmi/

"extragalactic astronomy" 的定义和意义

Extragalactic astronomy
01

外星系天文学

study of celestial objects outside the Milky Way galaxy
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