Which black hole has the largest known mass?
Quick Answer
TON 618 is one of the most massive black holes known, with an estimated mass of about 66 billion Suns. It is associated with a very distant quasar.
The Full Story
TON 618 is widely cited as containing one of the largest known black holes. Its mass is estimated at about 66 billion times the mass of the Sun, though exact values depend on the method used. The black hole powers a brilliant quasar seen from billions of light-years away, making it visible despite its great distance. Extremely massive black holes like this are found at the centers of active galaxies and help astronomers study how black holes grew so quickly in the early universe.
Key Facts
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