What was Ptolemys theory

What was ptolemy evidence for his theory?Ptolemy believed that astronomical elements existed in circular, rotating motions.Ptolemy believed that the heavenly bodies' circular motions were caused by their being attached to unseen revolving solid spheres.It is a powerful tool to apply to problems about inscribed quadrilaterals.It was superseded by a simpler, more straightforward theory.

The book that is now generally known as the almagest (from a hybrid of arabic and greek, the greatest) was called by ptolemy hē mathēmatikē syntaxis (the mathematical collection) because he believed that its subject, the motions of the heavenly bodies, could be explained in mathematical terms.(astronomy) the theory of planetary motion developed by ptolemy from the hypotheses of earlier philosophers, stating that the earth lay at the centre of the universe with the sun, the moon, and the known planets revolving around it in complicated orbits.The word for earth in greek is geo, so we call this idea a geocentric theory.Those harmonies he considered to be distributed in all.It gives in detail the mathematical theory of the motions of the sun, moon, and planets.