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Which of these assumptions is Ptolemy's model of planetary motion based on?



The sun moves around the earth.

The earth moves around the sun.

The stars do not move.

The earth is flat.

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The sun moves around the earth.
Ptolemy's model, also known as the geocentric model, assumed that Earth was at the center of the solar system and all other celestial bodies, including the Sun, revolved around it.

Answer:

The sun moves around the earth.        

Explanation:

According to Ptolemy, all the planets, moons, along with the Sun and other stars move around the Earth. The Earth is at the center of the universe. This model of planetary motion is based on the assumption  that the sun moves around the Earth. He accounted for the apparent motion of planets by epicycle. .

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