Messier 100 is a spiral galaxy located in the constellation Coma Berenices. It is approximately 56 million light-years away from Earth and is part of the Virgo Cluster, a group of galaxies that includes many other notable members. Discovered by the French astronomer Pierre Méchain in 1781, Messier 100 is known for its bright core and well-defined spiral arms. It has a diameter of about 100,000 light-years and contains a significant number of stars, gas, and dust, making it a fascinating object for astronomers studying galaxy formation and evolution.