The Smithsonian STEM Planetarium Projector brings the wonder of the galaxy right into your bedroom, living room, or playroom, transforming any space into a breathtaking night sky experience. This dual-function projector creates a rotating star pattern of the Northern Sky on your ceiling or wall, allowing you to enjoy realistic stargazing from the comfort of home. You can enhance your sky by selecting from 24 high-definition space images featured on three interchangeable discs, including planets, nebulae, moons, asteroids, spacecraft, astronauts, and more, offering over 50 exciting image combinations. Designed with bedtime in mind, the built-in 15-minute electronic timer with automatic shut-off lets children drift off under a magical sky. The set includes one projector, one image cover, three changeable slide discs, and detailed STEM educational instructions. The projector measures 14” x 4” x 10.75”, requires three AA batteries (not included), and adult supervision is recommended.