Astronauts-in-training can explore our solar system in brilliant color as this motorized model rotates and revolves. Combined effect of the sun's ultra-bright 1000-hour light bulb and disappearing black supports beneath the sun and planets creates spectacular results in a darkened room. Base indicates correct placement of planets. Unique stardome converts unit into a planetarium! Requires 4 C batteries, not included, or AC Adapter, available separately.