The star atlas companion is the ideal companion to any star atlas, as it is the first book to provide a true perspective on the characteristics and distances of over 1,100 stars and their movement through space. With the aid of scale diagrams, the reader can grasp difficult-to-understand concepts such as how far apart stars really are, their relative sizes, how fast they spin and their shapes, and how the constellation patterns change over time. This book, describes many stars visible to the naked eye in both the northern and southern hemispheres, explains binary and multiple star systems in detail, gives the properties of many open clusters, enables a true appreciation of the scale of our galactic neighborhood.