braddog6785 braddog6785
  • 10-06-2017
  • Physics
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The primary purpose of describing planetary orbits in terms of epicycles and deferents was to account for the

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egenriether
egenriether egenriether
  • 10-06-2017
Retrograde. Planets seem to move forward and then backward sometimes. This is really because we pass them as we move in our orbit but astronomers wanted to try to describe the solar system with earth at the center so elaborate models were employed.
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