Satellite galaxies are small galaxies that orbit around larger galaxies, such as our own Milky Way. These satellite galaxies are gravitationally bound to the larger galaxy and are often much smaller and fainter than their host galaxy. Satellite galaxies can provide valuable information about the formation and evolution of galaxies, as well as the distribution of dark matter in the universe. Studying satellite galaxies can help astronomers understand the dynamics of galaxy interactions, the effects of tidal forces, and the role of dark matter in shaping the structure of galaxies.