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Ptolemy thought of the geocentric theory or the theory where everything revolves around the earth. They also rvolve around the revloution like the earth revolves around earth.
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Discovered the heliocentris theory which means the sun is the center of the universe and everything revolves around it.
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He advanced in the telescope going from 8* to 32*. He also discovered more on the copernicus theory.
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Came up with three other laws of the heliocentric theory.
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He came up with the law of gravity. He foun this out by dropping to objects of the same mass from the same height will fall at the same speed. which maent that there must be a pulling force which came to be known as gravity.
