: a region at the center of a galaxy that produces an extremely large amount of radiation
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But other sources, like quasars, supernovae and gamma ray bursts, can fire off particles at extremely high energies.—Michael Irving, New Atlas, 29 Nov. 2024 Measurements of distances to quasars based on radio-interferometric techniques, for instance, are advancing, and there are prospects for using fluctuations in galaxy-surface brightness.—Marc Kamionkowski, Scientific American, 15 Oct. 2024 Or at least a lot like quasars from more recent periods in the Universe's history.—John Timmer, Ars Technica, 17 June 2024 Once activated, they are called active galactic nuclei, AGN, or quasars.—Giuseppina Fabbiano, Discover Magazine, 31 May 2024 See all Example Sentences for quasar
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