"The Galaxies Chart is 22.5 x29 inches, (56x73cm). The Galaxies Chart shows our galaxies are the stellar ""Cities of the Universe"" - the gathering places and residences of most stars. This informative chart explains through text and images the anatomy of a galaxy, the various types of galaxies, and light travel time as a unit for measuring distances in the Universe. Learn about our galaxy, the Milky Way, in relationship to other nearby galaxies and superclusters of galaxies. Find out why galaxies are considered both the hallmarks and the Rosetta Stones of the cosmos. This attractive yet informational print that is full of illustrations is a wonderful reference in the classroom."