What theory do astronomers think explains the activity in galaxies?
A) the explosion of a supermassive star
B) a chain reaction of supernovas
C) a cosmic worm hole
D) a supermassive black hole
E) All of these choices are correct.

Question

Quizplus · Accepted Answer

Astronomers believe that the activity in galaxies, such as the emission of large amounts of energy from their centers, is primarily due to the presence of supermassive black holes. These black holes can accrete matter, leading to energetic phenomena like quasars and active galactic nuclei.

What Theory Do Astronomers Think Explains the Activity in Galaxies