Tychonic cosmology

Tychonic cosmology

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Credit: SHEILA TERRY/SCIENCE PHOTO LIBRARY

Caption: Tychonic cosmology. Coloured historical artwork of the Earth-centred (geocentric) cosmological model proposed by the Danish astronomer Tycho Brahe (1546-1601). This was a compromise between the old Ptolomaic system and the 1543 Sun-centred Copernican system. In this model, the five known planets orbit the Sun, while the Moon and the Sun orbit the stationary Earth. An outer celestial sphere of stars is retained. Brahe based his model on his observations that the stars did not change position over a year (as he thought they would if the Earth moved about the Sun). However, the stars were too distant for him to detect this motion. From Bilder Atlas, Johann Georg Heck, 1860.

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Keywords: 19th century, artwork, astronomical, astronomy, bilder atlas, celestial spheres, circle, circles, circular, concentric, cosmological, cosmology, diagram, earth, encyclopedia, geocentric, german, heliocentric, historical, history of science, illustration, johann georg heck, jupiter, mars, mercury, model, moon, orbit, orbiting, orbits, planet, planets, ring, rings, saturn, solar system, sphere, stars, sun, system, tycho brahe, tychonic, venus

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