What are some signs of an active galaxy?
A) The core is very bright.
B) The core is very small.
C) Spectra of the core show that it contains hot gas moving at high speeds.
D) Electromagnetic radiation from the core fluctuates rapidly.
E) All of these choices are correct.

Question

Quizplus · Accepted Answer

Active galaxies have bright cores, small cores, spectra indicating hot gas moving at high speeds, and rapidly fluctuating electromagnetic radiation.

What Are Some Signs of an Active Galaxy