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Astrophysics, Cosmology & Relativity

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Quasar Astrophysics, Cosmology & Relativity Luminosity / Redshift z An extremely luminous Active Galactic Nucleus (AGN) powered by gas accreting onto a supermassive black hole at the center of a distant galaxy. L_quasar ~ 10⁴⁰ W (100–1000 times Milky Way Luminosity)