This dramatic light show brings our solar system right into your classroom. The model sun shines onto the 9 planets as they orbit around it. A star dome can replace the solar dome, converting a darkened room into a spectacular planetarium sky complete with major constellations. The base features planetary longitude marks, so the planets can be set up to their correct positions every day using the 5-year planetary longitudinal chart included. Powered by an AC adapter (included) or 4 C batteries (not included).