Topic summary
Messier 33
Extracted from the Wikipedia article Triangulum Galaxy.
The Triangulum Galaxy is a spiral galaxy 2.878 million light-years (ly) from Earth in the constellationTriangulum. It is catalogued as Messier 33 or NGC 598. With the D25isophotal diameter of 18.74 kiloparsecs (61,100 light-years), the Triangulum Galaxy is the third-largest member of the Local Group of galaxies, behind the Andromeda Galaxy and the Milky Way.