Waterproof Tear-Resistant Topographic Maps. The Night Sky - Stargazer Map Pack contains two maps, the Northern Hemisphere is centered on Polaris, the North Star, the Southern Hemisphere is centered near Crux, the Southern Cross. The constellations and brighter stars are labeled with their latin names. The map also includes a table of star magnitude or brightness. As the Earth moves in its orbit around the Sun the constellations in the sky change. The Night Sky maps include four seasonal charts that are specific for each season; spring, summer, autumn, and winter. The Stargazer Map and Guides are the ideal resource for exploring space from the comfort of your back yard. Each Stargazer Map and Guide is printed on waterproof and tear-resistant material and includes awe-inspiring images of the moon, planets, and deep space. Wherever your eyes wander the sky at night, these maps will help guide you. Night Sky Map Pack includes: -Night Sky - Northern Hemisphere -Night Sky - Southern Hemisphere Every Stargazer Map is printed on durable synthetic paper, making them waterproof, tear-resistant and tough capable of withstanding the rigors of repeated outdoor use.