What happens to active galaxies when their AGNs run out of fuel?
A) The black holes powering them collapse even further.
B) They simply become normal galaxies.
C) They slowly dissipate into clouds of gas and dust.
D) They eventually pull in material from farther out, starting the AGN process all over again.
E) They explode as gamma-ray bursts.

Question

Quizplus · Accepted Answer

When AGNs run out of fuel, the active galaxy transitions into a normal galaxy as the central black hole becomes less active without the accretion of material.

What Happens to Active Galaxies When Their AGNs Run Out