The extremely energetic early stage in the formation of an active galaxy, characterized by an output of radiation
Quasi stellar objects. Quasars are star like objects that give off more energy than 100 galaxies combined. They are perhaps the most distant objects yet detected in the universe. Many attempts have been made to interpret their behavior.
Originally, a distant, highly luminous object that looks like a star. Strong evidence now exists that a quasar is produced by gas falling into a supermassive black hole in the center of a galaxy. [More Info: Field Guide