ORRERY

Orrery

An orrery is a mechanical device that illustrates the relative positions and motions of the planets and moons in the Solar System in a heliocentric model. Though the Greeks had working planetaria, the first orrery that was a planetarium of the modern era was produced in 1704, and one was presented to the Earl of Orrery — whence came the name. They are typically driven by a clockwork mechanism with a globe representing the Sun at the centre, and with a planet at the end of each of the arms.

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orrery

Noun

  1. A clockwork model of any given solar system.


The above text is a snippet from Wiktionary: orrery
and as such is available under the Creative Commons Attribution/Share-Alike License.

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