The Sagittarius Dwarf Spheroidal Galaxy is a small, irregular galaxy that orbits the Milky Way. It is one of the closest known satellite galaxies of the Milky Way and is located in the constellation Sagittarius. This galaxy is of particular interest to astronomers due to its ongoing interaction with the Milky Way, which has led to visible tidal streams in the Milky Way's halo, providing insights into the structure and history of our galaxy.