What do the formation of the Solar System and the existence of AGNs have in common?
A) They both demonstrate the importance of how luminosity varies with time.
B) They both demonstrate the high efficiency of nuclear fusion.
C) They both demonstrate the importance of accretion disks.
D) They both demonstrate the importance of living in the center of a galaxy.
E) They both demonstrate the existence of dark matter.

Question

Quizplus · Accepted Answer

Both the formation of the Solar System and the existence of AGNs involve the accretion of material onto a central object via an accretion disk. In the case of the Solar System, this involved the gradual accumulation of material within the protoplanetary disk around the young Sun, while in AGNs, this involves the accretion of gas, dust, and stars onto the supermassive black hole at the center of the galaxy.

What Do the Formation of the Solar System and the Existence