Question

what is Epicyclic model​

Answer 1

Answer:

To explain the puzzling phenomena astronomers in early times proposed a change in the simple geocentric model. This is called as epicycle model

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Answer 2

Answer:

In mathematics: Applied geometry. Apollonius introduced an alternative “epicyclic” model, in which the planet turns about a point that itself orbits in a circle (the “deferent”) centred at or near Earth. As Apollonius knew, his epicyclic model is geometrically equivalent to an eccentric.