Messier 90 is a spiral galaxy located in the constellation Virgo. It is part of the Virgo Cluster, which contains many other galaxies. Messier 90 is approximately 60 million light-years away from Earth and has a diameter of about 100,000 light-years. Discovered by Charles Messier in 1781, Messier 90 is notable for its bright core and well-defined spiral arms. It is classified as a type SA spiral galaxy, indicating that it has a smooth, unbarred structure. Observations of Messier 90 help astronomers understand the dynamics and evolution of galaxies within clusters.