Reply to post: Heliocentric vs Epicyclic Models

Archaeologists and robots on hunt for more Antikythera pieces

David Pollard

Heliocentric vs Epicyclic Models

Occasionally I've wondered that the epicyclic celestial model might be more useful. It's all very well to know that the planets all move in more or less exact ellipses around the sun, but then how do you calculate how the fixed stars and the other planets will appear at any given time when seen from a rotating body itself moving on an elliptical path?

The use of epicycles might well be the most practical approach to producing a picture of the sky at a given time and place in the future.

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