extragalactic

adjective

ex·tra·ga·lac·tic ˌek-strə-gə-ˈlak-tik

: originating or existing outside the Milky Way galaxy

also : of or relating to extragalactic space

extragalactic astronomy

Examples of extragalactic in a Sentence

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That’s no supernova The most common extragalactic transient luminous events, meaning flashes of light that evolve and vanish rapidly, are supernovae. —

Elizabeth Rayne, Ars Technica, 27 Nov. 2023 This extragalactic neighbor of our home Milky Way galaxy is located almost 200,000 light-years away from Earth and could crash into our home galaxy in about two billion years. —

Laura Baisas, Popular Science, 29 Nov. 2023 True, astronomers still don’t know the origins of these extragalactic milliseconds-long radio pulses, and until this year fewer than 20 had ever been detected. —

Yvette Cendes, Discover Magazine, 15 Dec. 2016 Last year, IceCube physicists reported 79 neutrinos coming from the heart of a nearby galaxy called NGC 1068, the first steady source of extragalactic neutrinos pinpointed. —

Byadrian Cho, science.org, 22 June 2023 See all Example Sentences for extragalactic