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http://proza.ru/2023/09/10/982


TON 618 (short for Tonantzintla 618) is a hyperluminous, broad-absorption-line, radio-loud quasar and Lyman-alpha blob[2] located near the border of the constellations Canes Venatici and Coma Berenices, with the projected comoving distance of approximately 18.2 billion light-years from Earth.[note 1] It possesses one of the most massive black holes ever found, at 40 billion M;.[3]


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