The brightest known object (as of June 2024) in the universe is a quasar called J0529-4351. Located about 12 billion light-years away, this extraordinary cosmic phenomenon consists of a supermassive black hole actively devouring an orbiting disc of gas and dust. The black hole in this quasar is gobbling up more than a sun’s-worth of mass every day, making it the fastest growing black hole ever observed. Its luminosity outshines our sun by over 500 trillion times! Imagine the sheer brilliance of that cosmic spectacle!
Quasars are a subclass of active galactic nuclei (AGNs), extremely luminous galactic cores where gas and dust falling into a supermassive black hole emit electromagnetic radiation across the entire electromagnetic spectrum.

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