In the 1980s, unified models were developed in which quasars were classified as a particular kind of active galaxy, and a consensus emerged that in many cases it is simply the viewing angle that distinguishes them from other active galaxies, such as blazars and radio galaxies.
Na década de 1980, desenvolvéronse modelos unificados no que os quasares foron vistos como unha clase de galaxias activas, e nun consenso xeral emerxeu a idea de que a maioría dos casos era o ángulo de visión o que distinguía unhas clases de outras, como os blazars e as radiogalaxias.