Turn the disc to reveal the stars visible from your location on any night of the year. The 51.5N and 35S editions of this practical hour-by-hour tracker come with their own full-colour season-by-season guide to exploring the skies. Major constellations are used as signposts to navigate the night sky, introducing the novice astronomer to the joys of stargazing. The wallet also contains illustrated step-by-step instructions on how to use the planisphere.