What Happens to a Galaxy When Its Black Hole Jets Finally Die?

Astronomers have discovered that dying radio galaxies remain active long after their black hole jets shut down—but for far less time than previously thought.

These faint remnants typically survive for just 8–42 million years, offering new clues about the intermittent lives of supermassive black holes and the evolution of galaxies across cosmic time.

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This episode includes AI-generated content.