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Social Studies, 01.11.2019 04:31 kezionhoward13

How did the ptolemaic model explain the apparent retrograde motion of the planets? a) this model claimed that the planets moved on small circles which, in turn, moved on larger circles around the earth. b) the motion on the small circles, called "epicycles", combined with the motion on the larger circle sometimes produced backward motion. in the ptolemaic model, retrograde motion occurred when the earth passed by another planet in its orbit of the sun. c) this model claimed that the planets resided on giant spheres that sometimes turned clockwise and sometimes turned counterclockwise. d) all of the above e) none of the above

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