Planisphere

This traditional way to set the time and date and have it show you what is currently visible in the sky. Learn what is overhead tonight with one of astronomy’s classic observing tools. A planisphere is a rotating star chart that displays the portion of the night sky visible for a selected date and time. Simply adjust the movable sections and use the resulting map to help locate constellations and bright stars outdoors. Waterproof and durable, this reusable guide requires no batteries or electronics and is a standard item in every skywatcher’s toolbox.