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Research reveals the quasar H1821+643, despite its intense activity, has a minimal effect on its host galaxy, overturning expectations about the role of quasars. Astronomers have found a rapidly growing supermassive black hole (quasar) not achieving what they expect from it. Quasars are rapi

United statesUnited kingdomNottinghamh russellHarvard smithsonianKarlg janskyHelen russell university of nottinghamMonthly notices of the royal astronomical societySylvain veilleux university of marylandAndy fabian university of cambridgeSmithsonian astrophysical observatory chandrax ray centerChristopher reynolds university of marylandMichael mcdonald massachusetts institute of technologyThomas braben university of nottinghamNiel brandt penn state universityLucy clews university of nottinghamMarshall space flight center