The astronomical term 'quasi-stellar radio source' is more commonly expressed as what abbreviated word?
Astronomical radio source of the more notable are Centaurus A and Messier 87. Quasars (short for "quasi-stellar radio source") were one of the first point-like radio sources to be discovered. Quasars' extreme red shift led us to conclude that they are distant active galactic nuclei, believed to be powered by black holes. Active galactic nuclei have jets of charged particles which emit synchrotron radiation. One example is 3C 273, the optically brightest quasar in the sky. Merging galaxy clusters often show diffuse radio emission. The cosmic microwave background is blackbody background radiation left over from the Big Bang (the rapid expansion, roughly 13.8
Astronomical radio source Astronomical radio source Astronomical radio sources are objects in outer space that emit strong radio waves. Radio emission comes from a wide variety of sources. Such objects represent some of the most extreme and energetic physical processes in the universe. In 1932, American physicist and radio engineer Karl Jansky detected radio waves coming from an unknown source in the center of our galaxy. Jansky was studying the origins of radio frequency interference for Bell Laboratories. He found "...a steady hiss type static of unknown origin", which eventually he concluded had an extraterrestrial origin. This was the first time that radio