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Astronomers using the European Southern Observatory's (ESO) Very Giant Telescope (VLT) have discovered the brightest known black hole, identified as a quasar.

Some facts about quasars

• They are a subclass of active galactic nuclei (AGNs) known for their extreme luminosity.
• They are extremely luminous galaxy centres, where gas and dust fall into a supermassive black hole, emitting radiation across the entire electromagnetic spectrum.
• They are among the brightest objects in the universe, emitting thousands of times more light than the entire galaxy.