Orrery

[ɒ:rәri]

Definition

(noun.) planetarium consisting of an apparatus that illustrates the relative positions and motions of bodies in the solar system by rotation and revolution of balls moved by wheelwork; sometimes incorporated in a clock.

Editor: Stacy--From WordNet

Definition

(n.) An apparatus which illustrates, by the revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system.

Editor: Michel

Synonyms and Synonymous

n. Planetarium.

Edited by Johanna

Definition

n. an apparatus for illustrating by balls mounted on rods and moved by clockwork around a centre the size positions motions &c. of the heavenly bodies.

Checked by Jessie