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  2. On the Heavens - Wikipedia

    en.wikipedia.org/wiki/On_the_Heavens

    Sometimes Aristotle seems to regard them as living beings with a rational soul as their form [2] (see also Metaphysics, bk. XII). Aristotle proposed a geocentric model of the universe in De Caelo. The Earth is the center of motion of the universe, with circular motion being perfect because Earth was at the center of it.

  3. Celestial spheres - Wikipedia

    en.wikipedia.org/wiki/Celestial_spheres

    In Aristotle's fully developed celestial model, the spherical Earth is at the centre of the universe and the planets are moved by either 47 or 55 interconnected spheres that form a unified planetary system, [19] whereas in the models of Eudoxus and Callippus each planet's individual set of spheres were not connected to those of the next planet ...

  4. Dynamics of the celestial spheres - Wikipedia

    en.wikipedia.org/wiki/Dynamics_of_the_celestial...

    Although Nicolaus Copernicus (1473–1543) transformed Ptolemaic astronomy and Aristotelian cosmology by moving the Earth from the center of the universe, he retained both the traditional model of the celestial spheres and the medieval Aristotelian views of the causes of its motion. Copernicus follows Aristotle to maintain that circular motion ...

  5. Concentric spheres - Wikipedia

    en.wikipedia.org/wiki/Concentric_spheres

    The cosmological model of concentric (or homocentric) spheres, developed by Eudoxus, Callippus, and Aristotle, employed celestial spheres all centered on the Earth. [1] [2] In this respect, it differed from the epicyclic and eccentric models with multiple centers, which were used by Ptolemy and other mathematical astronomers until the time of Copernicus.

  6. How Aristotle and Dante Discover the Secrets of the Universe ...

    www.aol.com/aristotle-dante-discover-secrets...

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  7. De revolutionibus orbium coelestium - Wikipedia

    en.wikipedia.org/wiki/De_revolutionibus_orbium...

    For this reason, he was unable to account for the observed apparent motion of the planets without retaining a complex system of epicycles similar to those of the Ptolemaic system. Despite Copernicus' adherence to this aspect of ancient astronomy, his radical shift from a geocentric to a heliocentric cosmology was a serious blow to Aristotle 's ...

  8. Aristotelian physics - Wikipedia

    en.wikipedia.org/wiki/Aristotelian_physics

    Aristotelian physics is the form of natural philosophy described in the works of the Greek philosopher Aristotle (384–322 BC). In his work Physics, Aristotle intended to establish general principles of change that govern all natural bodies, both living and inanimate, celestial and terrestrial – including all motion (change with respect to place), quantitative change (change with respect to ...

  9. History of astronomy - Wikipedia

    en.wikipedia.org/wiki/History_of_astronomy

    Aristotle, drawing on the mathematical model of Eudoxus, proposed that the universe was made of a complex system of concentric spheres, whose circular motions combined to carry the planets around the Earth. [36] This basic cosmological model prevailed, in various forms, until the 16th century.

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