Orrery with wooden case, 1718-1747.
4 0 c m
actual image size: 26cm x 32cm

Orrery with wooden case, 1718-1747.

© Science Museum / Science & Society Picture Library


Detail of the planetary model made by the London instrument maker Thomas Wright (d 1767). Called an orrery or planetarium, it is a demonstration device to show the motions of the Earth and Moon around the Sun. This example has a wooden drum base with a hand painted plate and bras calendar ring supported on pillars. Such devices became popular during the 17th century, especially after Sir Isaac Newton (1642-1727) published his universal theory of gravity in 1687. To reproduce the motions of the solar system this model employs a hand crank to drive the gear wheels. This type of orrery would have been commonly employed at public astronomy lectures.

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