Quasars,double-radio sources,and BL Lacertae objects may well be the same kind of object.The difference in their appearance is simply that:

Question

Quizplus · Accepted Answer

The difference in appearance between Quasars, double-radio sources, and BL Lacertae objects is due to the orientation of our line of sight to the axis of their ejected jets of matter. While they may be the same type of object, the way we see them from Earth can vary depending on this orientation. The other options are not correct, as Quasars are not in the Milky Way Galaxy, double-radio sources are not associated with other galaxies, and BL Lacertae objects are not necessarily in the vast voids of space between galaxies. Their ages and sizes also do not determine their appearance.

Quasars,double-Radio Sources,and BL Lacertae Objects May Well Be the Same