Get to know constellations without a book Navigation with the rotating celestial chart Folder with rotating celestial chart and audio CD. If you don't want to read, you can listen: Listen - with your eyes free to look - to a tour through the constellations in the sky. The CD has a 15 minute celestial tour ready for each season. You can, of course, also trace the walks through the sky on the rotating chart - it offers the perfect navigation for outdoors and indoors. Instructions for using the celestial chart and many tips for observation in the folder complete this beautiful gift.