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Dynamic Diagrams | dD Orrery

Posted by BenEspen from www.dynamicdiagrams.com
Dynamic Diagrams | dD Orrery
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From Wikipedia:

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.