Messier 100

Messier 100 (M100 or NGC 4321) is a spiral galaxy about 55 million light-years' distant that is oriented moderately close to perpendicular to the line of sight, i.e., so the spiral is fully in view. It is classified as a grand design spiral galaxy, showing a very clear spiral structure. A number of supernova have been identified in it. Like Whirlpool Galaxy, its orientation makes it ideal for many observations aimed at discovering the architecture of spiral galaxies such as the frequency, location, and density of molecular clouds.