FAQ: Q: How many disks does the Smithsonian planetarium projector have? A: Three disks feature 24 high-definition space images to project alongside the stars: planets, nebulae, moons, asteroids and more. The Smithsonian Planetarium Projector features a 15-minute auto-shut-off, so you can fall asleep under a magical night sky. Q: How long does the Smithsonian planetarium … Read more