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John Rowley Orrery
Fine Art Reproduction
An orrery of John Rowley.
Detail of an engraving
from The Universal Magazine (1749)
An orrery is a mechanical device that illustrates the relative positions and motions of the planets and moons in the solar system in heliocentric model. They are typically driven by a large clockwork mechanism with a globe representing the Sun at the centre, and with a planet at the end of each of the arms.