Messier 33 or the Triangulum Galaxy located conveniently in the constellation of Triangulum is a member of our local group of galaxies. The third biggest of a group that includes the Milky Way and the Andromeda Galaxies. A spiral galaxy that is approximately 2.7 million light years away. Smaller than the Milky Way, it contains some 40 billion stars compared to the 400 billion plus stars of the Milky Way galaxy.
Numerous HII regions can be seen located in the galaxy as pinkish red sections, the largest is NGC 604 which is amoung the largest HII regions in our local group. It would be over 40 times the size or our Orion Nebula.