There are many billions of stars populating the galaxy, all of which are in motion relative to one another. Planets and smaller masses are in constant orbit around many of these stars. Vast numbers of nebulae and other astronomical anomalies are also present throughout the galaxy. Traveling between the worlds of the galaxy requires at least a rudimentary knowledge of the galaxy’s organization and composition. It also requires a navicomputer that is up to date on the current time and relative motion of all of these objects. The Astrogation skill represents a character’s ability to use his knowledge of the galaxy to most effectively program the hyperspace coordinates for any jump. It can also represent a character’s knowledge of stellar locations, astronomy, and the formation of the galaxy.