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revolution models
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describe and compares different revolution models
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1Revolution Models
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, REVOLUTION MODELS 2
Revolution Models
Introduction
The revolution of the entire solar system had become problematic over the centuries as
different astrologists give their view on the knowledge of the universe. Two of the most studied
and contradicting models of the solar system are; the Ptolemaic model and the Copernican
model. This paper digs into the reality of the models.
Ptolemaic Model
This model indicates that the earth is settled at the core of the cosmos. Primarily, the
model was founded by a Greek mathematician and an astronomer called Claudius Ptolemy. The
astronomer used Babylonian observation and lunar theory (Abernethy, 1987).
The model’s argument about the earth being at the core of the cosmos was settled on a
simple observation. To expand, it denoted that stars are divided equally above and underneath
the horizon as they have an equal geographical length from the cosmos’s center. According to
the Ptolemaic theory, each planet was kept in motion by a network of double spheres called the
epicycles (Abernethy,1987). The 'different' contains distinct eccentrics that accounted for the
different seasons. Notably, the planets moved around the epicycle while the epicycle shifted
along the path generated by the 'different.' This resulted in retrograde motion around the earth.
Nevertheless, Equant was developed whereby the center of the planet epicycles seen to
move in a uniform motion while standing at a specified location. Using the equant, Ptolemy
suggested that the planets moved in a uniform circular motion. The Ptolemaic order of spheres
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