Which observational fact about quasars and their behavior is perhaps the most extraordinary?
A)velocities of recession of up to 9/10 of the speed of light
B)distances from the Sun of up to 18 billion ly
C)incredibly powerful radio emitters, such that simple receivers can detect them, from vast distances across the universe
D)energy output equivalent to 1000 galaxies from a volume as small as our planetary system

Question

Quizplus · Accepted Answer

The energy output of quasars being equivalent to 1000 galaxies from a volume as small as our planetary system is a truly extraordinary fact. It is hard to fathom how such incredible amounts of energy can be generated from such a small space.

Which Observational Fact About Quasars and Their Behavior Is Perhaps