| 1. | This could not have been accomplished with deferent / epicycle methods.
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| 2. | For the Moon, he used a deferent and epicycle model.
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| 3. | Maybe all these epicycles didn't predict well enough.
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| 4. | Maybe Starr can prove these endless epicycles of conspiracy.
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| 5. | In it he drastically reformed the eccentric and equant by introducing extra epicycles.
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| 6. | The planets were thought by Ptolemy to orbit Earth in deferent and epicycle motions.
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| 7. | In a deferent / epicycle model, the parts of the whole are interrelated.
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| 8. | :: : Okay; that explains why we would have had epicycles before.
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| 9. | Epicycles existed before the Ptolemaic system, though.
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| 10. | epicycles using the Tusi couple, thus eliminating the Ptolemaic eccentrics and equant . ]]
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