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Ptolemy's research in the field of astronomy led him to continue down the vein of other Greek scholars who believed in the Geocentric system of planetary orbit. The Ptolemaic system, which believed that the planets and sun moved in small mini-orbits, known as epicycles, within a larger, greater orbit around the earth, was comprised in order from closest to farthest as Mercury, Venus, Sun, Mars, Jupiter, and Saturn. Due to this system's ability to fairly accurately predict the paths of the observable planets in the sky, it remained widely accepted until Copernicus became champion, if you will, of the Heliocentric theory. Even then, Ptolemy's system was still better able to explain the motions of the planets. It was not until the later addition of Kepler's laws of motion that the Heliocentric theory fell neatly into place.

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Was Copernican in the heliocentric or geocentric system?

The proposed the heliocentric system.


Who contradicted the geocentric system?

The Heliocentric System. m.i.


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Is Uranus in the heliocentric or the geocentric system?

Uranus is in the heliocentric system like all the other planets. The geocentric system is now only of interest historically. It wasn't correct.


Why has the heliocentric model been replaced with the geocentric model?

The heliocentric model is the one that replaces the geocentric model because the heliocentric model better described the solar system.


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in a heliocentric system earth and the other planets revolving planet's a geocentric system ,earth is at the center of the revolving planets


What evidence is there for the earths revolution around the sun?

the heliocentric system and the geocentric system


How are the heliocentric theory and the geocentric theory different?

Heliocentric = The Sun is at the center of our solar system. Geocentric = The Earth is at the center of our solar system. Insisting the Sun is at the center, which it is, once very much angered the church.


Do the observed phases of Venus support the heliocentric system?

The phases of Venus are well supported by the heliocentric system, but they are also supported very well by the previous geocentric system. All you need for Venus to have phases is that Venus should pass between Earth and Sun. That happens in both the heliocentric system and the geocentric system.


Do The observed phases of Venus supported the heliocentric system?

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What is the difference between a geocentric and heliocentric model of the solar system?

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What is the difference between geocentric and heliocentric?

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