Term
| what is the occasional westward movement of the eastward moving planets is called what? what planet has the most notable of this motion? what did people who believed in the geocentric motion think this was caused by? what is it really caused by? |
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Definition
retrograde motion, mars
epicycles/deferent of planets, the fact that the earth orbits faster |
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Term
| what is the epicycle system of motion called? |
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Definition
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Term
| who formed the heliocentric model? who found the arrangements of the planets? |
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Definition
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Term
| who found that planet's move in an elipse? |
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Definition
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Definition
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