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This orrery, a model which shows how planets revolve around the sun, is on display at the School of Physics and Astronomy. It was built by Benjamin Cole of London between 1748 and 1760. The four inner most planets are mounted on plates and connected…

Closeup of the earth and moon display on the orrery. The moon is also driven around the earth by the mechanism driving the earth around the sun.

Closeups of the various features of the orrery mentioned in the description

Instead of wooden panels on its base faces, this orrery has glass windows so that the interior driving mechanism can be observed. Notice also the hand crank which controls the rotation of the planets.

A closeup of the four inner planets of the orrery. These are driven by the mechanism at the right rates. The moon also revolves around the earth in the model.

Closeup of Jupiter and its moons. While not connected to the main driving mechanism, Jupiter was free to rotate around the orrery on a moving arm.

Closeup of outer rim engraved with the months and Zodiac signs.

Closeup of Saturn and its moons. While not connected to the main driving mechanism, Saturn was free to rotate around the orrery on a moving arm.