67 slide PowerPoint that gives a basic over view of what galaxies are. Gives a historical approach as well as a scientific approach - Topics: visual observation,imaging,Spectroscopy, Cepheid's, morphology and more. Great for HS Astronomy or even college class. Starts off very basic - showing objects as Nebula as many astronomers believed. The quotes people like Kant, Halley,Messier, and Herschel. Cepheid variables, radial velocities, and a detailed look at the great debate about if galaxies were external objects to the Milky Way. Finally, the distances to galaxies are calculated using five different methods.