What exactly is a quasar?
Thanks, George T.
The term “quasar” is shortened astronomer-speak for a quasi-stellar radio source. This, in turn, refers to a very lively but very distant-from-Earth active galactic nucleus. Quasars are sources of electromagnetic energy, including radio waves and visible light, that are often found in the centers of active young galaxies. In turn, quasars surround black holes.