The Night Sky 2-Sided Planisphere Star Chart Map 30-40 Degrees N Latitude is a great way to explore and learn about the stars, planets and constellations. With the help of this map, you can easily find celestial objects that are visible from your location. The map is easy to use and is a great tool for amateur astronomers and stargazers alike. The Night Sky Planisphere Star Chart Map is made by the Chandler Company, a trusted name in astronomy equipment. The map is designed for people of all ages and is perfect for beginners as well as experienced stargazers.