Ferguson's epicyclic diagram, 1756

Ferguson's epicyclic diagram, 1756

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Credit: ROYAL ASTRONOMICAL SOCIETY/SCIENCE PHOTO LIBRARY

Caption: Ferguson's epicyclic diagram. This diagram was published in 1756 by the Scottish astronomer and instrument maker James Ferguson (1710-1776), in his book 'Astronomy explained upon Sir Isaac Newton's Principles'. It shows the Earth at centre, with the Sun tracing a circular orbit. The orbits of Mercury and Venus in this geocentric system are shown by a series of complex epicycles.

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Keywords: 1700s, 1756, 18th century, artwork, astronomical, astronomy, astronomy explained upon sir isaac newton's principles, black-and-white, celestial mechanics, diagram, drawing, earth, geocentric, historical, history, history of science, illustration, inner solar system, james ferguson, mercurian, mercury, monochrome, orbit, orbital, orbital mechanics, orbits, physical, physics, planet, planetary science, research, scottish, space, star, sun, theory, venus, venusian, white background

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