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Created page with "==Introduction== A quasar is a highly energetic astronomical object found in the distant universe, believed to be powered by accretion of material into supermassive black holes in the centers of distant galaxies. Quasars are among the brightest and most distant objects in the known universe. ==Discovery== Quasars were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, in the 1950s..."
