For demonstrating our solar system, i.e. the orbits of the eight planets and the Moon. The planets are mounted on moveable arms, which rotate around the Sun, and the Moon rotates around Earth. A 3.5 V / 0.3 A bulb illuminates the Sun.
Diameter of the Sun: 3.8 cm. Max. orbit radius: 19 cm.
Includes bulb, but not batteries (2 x 351005).