Orrery

Orrery is a mechanical toy which exhibits, by an arrangement of rods, balls, and toothed wheels, the sun, the planets, and their moons, all performing their respective motions; so named after the Earl of Orrery, for whom Charles Boyle made the first one in 1715.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)