Basing his ideas on the earth being at rest and heavenly bodies moving in circular motions, Ptolemy devised models of the universe with many variables which created a great amount of complexity. ... Copernicus was successful in calculating first the distance from Venus to the sun using basic trigonometry. ... Since Copernicus did not question the assumption of uniform circular motion, the Copernican model had the Sun at the center and the planets still executing uniform circular motion about it. As a consequence, the Copernican model, with its assumption of uniform circular motion, still could...

• Word Count: 1448
• Approx Pages: 6

This trigonometric functions are considered as the best gift to mathematics by Ptolemy and these trigonometric function are acknowledge the world about the length of the chord in the circle. ... With this model he tried to explain the circular motion and the uniform angular velocity and he also mentined the earth not in the circle and he mentined earth some distance away from the centre. ...

• Word Count: 1666
• Approx Pages: 7
• Has Bibliography