Final answer:
The Milky Way Galaxy consists of a disk, bulge, and halo. The disk is a thin, rotating structure containing dust, gas, and stars. The bulge is a peanut-shaped region at the center, and the halo is a spherical region surrounding the bulge and disk.
Step-by-step explanation:
The Milky Way Galaxy consists of several major components: the disk, the bulge, and the halo. The disk is a thin, rotating structure that contains dust, gas, and young and old stars. It is approximately 100,000 light-years in diameter and 2000 light-years thick. The bulge is a peanut-shaped region at the center of the disk, composed mostly of old stars. The halo is a spherical region surrounding the bulge and disk, containing very old and faint stars, as well as globular star clusters.