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In your own words, explain a crucial piece of evidence that Ptolemy used to construct his explanation of the solar system.

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User VFreguglia
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Two commonly made observations supported the idea that the Earth was the center of the Universe. The first observation was that the stars, sun, and planets appear to revolve around the Earth each day, making the Earth the center of that system.

The second common notion supporting the geocentric model was that the Earth does not seem to move from the perspective of an Earth bound observer, and that it is solid, stable, and unmoving. In other words, it is completely at rest.
User Keeehlan
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