Tychonic cosmology

Tychonic cosmology

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Caption: Tychonic cosmology. Historical diagram of the Earth-centred (geocentric) Tychonic cosmological model. This was proposed by the Danish astronomer Tycho Brahe (1546-1601) as a compromise between the old Ptolomaic system and the 1543 Sun-centred Copernican system. He had the five known planets orbit the Sun, and the Moon, the Sun and an outer sphere of stars, orbiting the stationary Earth. He based this on his observations that the stars did not change position over a year (as they would if the Earth moved about the Sun). However, the stars were too distant for him to detect this motion. Diagram published in Italy in 1653.

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Keywords: 17th century, artwork, astronomical, astronomy, black-and-white, cosmological, cosmology, diagram, geocentric, historical, history of science, illustration, italian, italy, model, monochrome, orbit, orbiting, orbits, planet, planetary, planets, seventeenth, solar system, space, theory, tycho brahe, tychonic, universe

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