The velocity width and luminosity of these entities are compared by the Tully-Fisher relation.
The velocity width and luminosity of these entities are compared by the Tully-Fisher relation. Irregular ones of these lie off the branches of the tuning fork diagram that separates these entities into two main subclasses, one of which can be "barred." Supermassive black holes are found at the center of many, if not all, of these systems, no matter if they are (*) spiral or elliptical. Give this term for a collection of stars and other celestial matter, famous examples of which include Andromeda and our home, the Milky Way.
The velocity width and luminosity of these entities are compared by the Tully-Fisher relation.
{Galaxy} or {Galaxies}