A galaxy group is an aggregation of galaxies comprising about 50 or fewer gravitationally bound members, each at least as luminous as the Milky Way. Our Milky Way belongs to the Local Group, which also includes the Andromeda Galaxy and the Triangulum Galaxy.
The Local Group is the galaxy group that includes the Milky Way. It has a total diameter of roughly 3 megaparsecs and contains more than 54 galaxies, dominated by the Andromeda Galaxy and the Milky Way.
The Local Group is the galaxy group that includes the Milky Way. It has a total diameter of roughly 3 megaparsecs and contains more than 54 galaxies, dominated by the Andromeda Galaxy and the Milky Way.
Spiral galaxies are twisted collections of stars and gas that often have beautiful shapes and are made up of hot young stars. They are characterized by a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge.
Structure: Arms & Disk
Formation: Density Wave Theory
Examples: 3 in Local Group
Galaxy Group
Gravitationally Bound Systems
A galaxy group is an aggregation of galaxies comprising about 50 or fewer gravitationally bound members, each at least as luminous as the Milky Way. Our Milky Way belongs to the Local Group, which also includes the Andromeda Galaxy and the Triangulum Galaxy.