The Milky Way Halo is a vast, spherical region surrounding the Milky Way Galaxy. It contains older stars, globular clusters, and dark matter. This halo extends far beyond the visible disk of the galaxy, influencing its gravitational dynamics and structure. The halo is primarily composed of low-density gas and dark matter, which is invisible but makes up a significant portion of the universe's mass. Studying the halo helps astronomers understand the formation and evolution of the Milky Way and its interactions with other galaxies in the universe.