Visually, they appear as roughly circular bright spots; however, radiation at other wavelengths is often emitted from lobes on opposite sides of the visual bright spot.
Visually, they appear as roughly circular bright spots; however, radiation at other wavelengths is often emitted from lobes on opposite sides of the visual bright spot. The nearest of them, Centaurus A, was once believed to be the collision between an elliptical and a spiral galaxy, but is now believed to be a singular system with two separate pairs of long-wavelength radiation sources. FTP, name these astronomical objects, of which the first to be detected was Cygnus A, that often emit a million times more radiation in the kilohertz and megahertz range than the Milky Way.
Visually, they appear as roughly circular bright spots; however, radiation at other wavelengths is often emitted from lobes on opposite sides of the visual bright spot.
Radio Galaxies