i think he was tring to figure out how the universe was shaped. he probably thought the earth was in the middle of everything because we could see the sun and the moon from earth, but the other planets only at certin points each year
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Ptolemy's theory was that the earth was the center of the universe, around which all things - including the sun - revolved.
geocentric
Claudius Ptolemy synthesized and extended Hipparchus' system of epicycles and encentric circles to ezplain his geocentric theory off the solar system.
Um... Ptolemy. Hence the name (the adjectival form is usually spelled "Ptolemaic", though). You're more generous than I am if you call him a "scientist," though.
Cleopatra's brother were Ptolemy XIII and Ptolemy XIV.
ptolemy was a person