The Answer There are indeed different types of galaxies. An irregular galaxy has an undefined shape and has lots of young stars, dust and gas. A spiral galaxy is shaped like a disk, usually with a bulge in the center and with arms that spiral outwards as the galaxy rotates.
Spiral galaxies tend to contain more middle-aged stars along with clouds of gas and dust.
Elliptical galaxies contain older stars and very little gas and dust. They can be different shapes ranging from round, to flattened, elongated spheres. Show me a printable version of this page. Please let us know .