Today we know that what all quasars have in common is that they appear to be small sources of energy with

Question

Quizplus · Accepted Answer

Quasars are known to have high redshifts, indicating that they are located at extreme distances from Earth. This is a defining characteristic of quasars and leads to their designation as some of the most distant and energetic objects in the universe. Strong radio emissions, apparent motion across the sky (proper motion), and gravitational lenses are all features that may be associated with quasars but are not necessarily present in all cases. Likewise, the absence of lines in the spectrum (choice B) is not a characteristic of quasars but rather a sign of a lack of specific chemical elements in the object's atmosphere.

Today We Know That What All Quasars Have in Common