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extragalacmy
/ˌɛkstɹəɡɐlˈaktɪk ɐstɹˈɒnəmɪ/
Extragalactic astronomy
01
study of celestial objects outside the Milky Way galaxy
Examples
Extragalactic astronomy explores objects beyond our Milky Way.
Galaxies outside our own are considered extragalactic.
