orrery (n.)

a model solar-system machinery constructed to represent the motions of the planets in their orbits, 1713, invented c. 1704 by English clockmaker George Graham (1673-1751) and constructed by instrument maker John Rowley. Graham gave a copy to his patron, Charles Boyle (1674-1731), 4th Earl of Orrery (Cork) and named it in his honor.