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“extragalactic”
extragalactic (adjective), more extragalactic, most extragalactic
In astronomy, concerning the existence or occurrence of objects outside the large group of stars and planets that the Earth and the sun are part of: Since instruments for outer space have been improved over time, distant extragalactic matter can be observed and examined in greater detail.
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extra, extra-, extro-, extr-, exter-
(page 2)
galacto-, galact-, -galaxy
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“extragalactic”
extragalactic (adjective) (not comparable)
Outside of, or beyond, our galaxy, or system of stars: Since Mary was very interested in astronomy, she wanted to learn more about what perhaps was on the other side of the Milky Way Galaxy, so she took a course in extragalactic astronomy.
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Astronomy and related astronomical terms
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“extragalactic”
The astronomical field that deals with objects beyond the Milky Way: Sam learned about galaxies and quasars in his studies in extragalactic astronomy.
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Astronomy and related astronomical terms
(page 11)