geocentric-model | space-encyclopedia

Space Travel

22, May, 2012

Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.

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Term	Definition
Geocentric Model	A model of the solar system that places a stationary Earth at the centre of the motion of the Sun, Moon and planets. This was the universally accepted view of the cosmos until Copernicus 1473-1543 suggested that a solar system with the Sun in the middle would provide a more elegant explanation of observed planetary motions. Predictions of the movements of the planets in the geocentric system were made on the basis of a complex theory of epicycles set out by the Greek astronomer and mathematician Ptolemy c. AD 100-170. See also: heliocentric model.

Term

Definition

Geocentric Model

A model of the solar system that places a stationary Earth at the centre of the motion of the Sun, Moon and planets. This was the universally accepted view of the cosmos until Copernicus 1473-1543 suggested that a solar system with the Sun in the middle would provide a more elegant explanation of observed planetary motions. Predictions of the movements of the planets in the geocentric system were made on the basis of a complex theory of epicycles set out by the Greek astronomer and mathematician Ptolemy c. AD 100-170. See also: heliocentric model.