M33, also known as the Triangulum Galaxy, is a spiral galaxy located in the constellation Triangulum. It’s the third-largest member of the Local Group of galaxies, which includes the Milky Way, the Andromeda Galaxy, and about 54 other smaller galaxies. M33 is about 3 million light-years away from Earth and is approximately 60,000 light-years in diameter. It’s known for its well-defined spiral structure and contains a high number of H II regions, which are large clouds of ionized hydrogen where new stars are forming. It’s a popular target for amateur astronomers due to its brightness and relatively close proximity.
