Messier 99 is a spiral galaxy located in the constellation Coma Berenices. It is approximately 55 million light-years away from Earth and is part of the Virgo Cluster. This galaxy is notable for its well-defined spiral arms and bright core, making it a popular target for astronomers. Discovered by Pierre Méchain in 1781, Messier 99 is classified as a type Sc spiral galaxy. It has a diameter of about 100,000 light-years and contains a significant number of stars, gas, and dust. Its distinct structure and features contribute to our understanding of galaxy formation and evolution.