A massive black hole swallowed so much of the mass from its surrounding galaxy that it has gone dormant

Massive black hole in the early universe spotted taking a ‘nap’ after overeating - EurekAlert

Astronomers Discover Hungriest And One of the Most Massive Black Hole With 34 Billion Times The Mass of Our Sun And Eats One Sun Per Day

65,000,000x the Mass of Our Sun: Hubble Reveals a Brilliant Galactic Core Powered by a Massive Black Hole