The prototypical one of these point radio emitters was believed to be a star in Lacerta until 1968,  1  and Oke and Gunn showed that these objects are extra-galactic in 1974, which proves them to be among the  most luminous objects in the universe. Many of these objects exhibit superluminal motion, and optically  violent variables are particularly spectacular examples of t
The prototypical one of these point radio emitters was believed to be a star in Lacerta until 1968,  1  and Oke and Gunn showed that these objects are extra-galactic in 1974, which proves them to be among the  most luminous objects in the universe. Many of these objects exhibit superluminal motion, and optically  violent variables are particularly spectacular examples of these astronomical objects, of which about two  hundred are known. For ten points, name the extremely variable astronomical emitters that are hypoth-  esized to be quasars whose spectra have been altered by gravitational lensing, or quasars-like nuclei with  accretion jets pointed more or less directly at the observer.
The prototypical one of these point radio emitters was believed to be a star in Lacerta until 1968,  1  and Oke and Gunn showed that these objects are extra-galactic in 1974, which proves them to be among the  most luminous objects in the universe.
blazars