What is a quasar?
A) an AGN powered by a supermassive black hole
B) a star that only emits radio waves
C) a star made up of quarks
D) a galaxy that has its light affected by a gravitational lens

Question

Quizplus · Accepted Answer

A quasar is short for "quasi-stellar radio source" and is a type of active galactic nucleus (AGN) powered by a supermassive black hole at the center of a galaxy. Quasars are some of the brightest and most distant objects in the universe and emit large amounts of radiation across the electromagnetic spectrum.

What Is a Quasar