What type of object is believed to be the central source of energy for an active galaxy?
A) an unusually large and bright main sequence star
B) a large amount of gas and dust
C) a massive black hole
D) globular cluster

Question

Quizplus · Accepted Answer

The central source of energy for an active galaxy is believed to be a massive black hole. These black holes have accretion disks of gas and dust that emit enormous amounts of energy as they are pulled in by the black hole's gravity.

What Type of Object Is Believed to Be the Central