What is the term for a galaxy that is a rotating disk of stars and dust?
Milky Way
cosmic galaxy
nebula
spiral galaxy
A spiral galaxy is a rotating disk of stars and dust. In the center is a dense bulge of material. Several spiral arms come out from the center. Spiral galaxies have lots of gas and dust and many young stars. The image below ( Figure below ) shows a spiral galaxy from the side. You can see the disk and central bulge.