These notes are on the types of galaxies that exist within our universe. They also include some beautiful images of different galaxies that help students visualize the different types. My students always LOVE this presentation and are really amazed by the different types of galaxies in the universe besides our own!
Looking for a comprehensive worksheet on galaxies? Check out this other product of mine: http://www.teacherspayteachers.com/Product/Name-That-Galaxy-1093083
(astronomy, science, middle school, general science, galaxies, Milky way)