@universe.explaining: TON 618 is one of the most massive black holes ever discovered, located billions of light-years away in the constellation Canes Venatici. It is classified as a hyperluminous quasar, with a mass estimated at over 66 billion times that of the Sun. The immense gravity of TON 618 powers its quasar, releasing staggering amounts of energy as surrounding matter falls into it, making it one of the brightest and most extreme objects in the universe.