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All the stars are fixed to a sphere, which rotates once in 24 hours.

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10y ago

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Why Aristotle believe in geocentric?

because he thought that if more people believe in the geocentric model then his theory would but correct. because he thought that if more people believe in the geocentric model then his theory would but correct.


Why did early astronomers believe the geocentric model was true?

Early astronomers believed in the geocentric model because it appeared to explain the motion of celestial bodies in the sky. The model was supported by the apparent daily motion of the sun and stars around the Earth. Additionally, there was a philosophical and religious belief at the time that Earth was the center of the universe.


What was the purpose of the epicycle in the Ptolemaic model?

The epicycle in the Ptolemaic model was used to explain the retrograde motion of planets. It involved planets moving on small circular orbits within the larger orbit around Earth. By incorporating epicycles, Ptolemy was able to account for the observed motions of the planets in the night sky.


In the geocentric model the motion of the sun was what'?

It was in orbit around the earth.


Who created the first model of planetary motion?

Ptolemy created the Geocentric model in 2AD


In the geocentric model the earth at the center of the universe which motion would occur?

In the geocentric model, the motion of the celestial bodies would occur in complex patterns around the Earth. This model posited that the Sun, Moon, planets, and stars all revolved around the Earth in circular orbits. The geocentric model was later disproven by the heliocentric model proposed by Copernicus.


Explain theories of Aristotle ptolemy Copernicus and Galileo and explain how ideas progressed with each scientist?

Aristotle said the earth was in the center. Ptolemy supported Aristotle and added to it. Copernicus said the sun was in the middle. Galileo also said the sun was in the center and added to Copernicus.


Earth at the center of a series of concentric spheres?

"Geocentric".


Why was it difficult for ancient astronomers to explain about the apparent retrograde motion?

If, as ancient astronomers thought, that our Earth was the center point of rotation for other planets, then it is difficult to explain why those planets would move in a direction opposite to their rotation. Ptolemy came up with a solution that worked, but it was a cumbersome one. Nicolae Copernicus was able to show that this retrograde motion could be explained easily if it were assumed that our Sun was the actual center of rotation of the planets.


What geocentric model of the earth is?

There is no geocentric model of the earth!


What are the contributions of Eudoxus in geocentric theory?

He created a model for the universe that explained retrograde motion if Earth was at the centre.


What is the difference between the geocentric and heliocetric models of planetary motion?

Well, let's paint a happy little picture here. In the geocentric model, Earth is believed to be the center of the universe, with all other planets and the Sun revolving around it. On the other hand, in the heliocentric model, the Sun is at the center, and Earth and other planets orbit around it. Both models have their own beauty and history, showing us how our understanding of the cosmos has evolved over time.