M73 is a group of four galaxies located in the constellation of Virgo. It is classified as a compact galaxy group, meaning the galaxies are relatively close to each other in space. The group is notable for its interactions and gravitational influences among the member galaxies, which can lead to interesting astronomical phenomena. The M73 group is often studied to understand galaxy formation and evolution. It is part of the larger Virgo Cluster, which contains thousands of galaxies. Observations of M73 help astronomers learn more about the dynamics of galaxy groups and the effects of dark matter in the universe.