Galaxies
Parts of the GalaxyThe GalaxyThe Central Bulge The Thin Disk The Thick Disk Orbits The Halo The Dark Halo Star Populations The Disk Globular Clusters and the stars in the thick disk move in highly elliptical orbits that pass through the central bulge. The thick disk rotates as a unit around the central bulge at about half the speed of the thin disk. Milky Way Graphic by Lucas Leslie, Yr 9 student, ESC, May 2000 |