Geocentric Model of the Universe

Geocentric Model of the Universe

GEOCENTRIC MODEL

OF THE

UNIVERSE


In astronomy, the geocentric model is a superseded description of the universe with Earth at the center. Under the geocentric model, the Sun, Moon, stars, and planets all orbited Earth.

Below are the proponents of the geocentric model of the universe, their models, description of their model and the picture of their model.



Pythagoras (Pythagorean Model)

-In Pythagoras model, earth is at rest at the center of the universe and everything rotates around it. Pythagoras also considered that the motions of the planets were mathematically related to musical sounds and numbers. These ideas are called "The music of the Spheres".



Plato ("Saving the Appearance")

-he assumed that all motions in the universe are perfectly circular and that all heavenly bodies are ethereal or perfect.



Eudoxus' Model (Homocentric)

-Created the first model of a geocentric universe. Celestial spheres share one common center-earth. The sun's sphere orbits the earth once every 24 hours. 











Aristotle's Model

- Extended Eudoxus' model of the universe. Sun, moon, planets, and stars all orbiting the earth inside of Eudoxus' spheres.













Ptolemy's Model

- All celestial objects including the planets, sun, moon, and stars orbited Earth. Earth is at the center of the universe.
EPICYCLE - the circular orbit of the planet. 
 

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