ABSTRACT
This chapter discusses the radio emission from the normal galaxies. The local universe abounds with galaxies that have a variety of shapes and sizes. Galaxies are often categorized by their morphology using a classification scheme developed by Edwin Hubble, Edwin in the early 20th century. The elliptical galaxies have an ellipsoidal shape with a smooth distribution of light, and vary from being nearly spherical to being highly oblong. Galaxies of all morphologies have a broad range of sizes and masses. Galaxies are often found in groups and these groups can vary from having only a few galaxies as members to well over a thousand galaxies. Obtaining images of the radio continuum emission from galaxies at the long radio wavelengths requires radio interferometers. Models suggest that many more fainter galaxies are present in these data, emission from these fainter galaxies that have been blurred and blended together by the relatively low resolution of this image.
