The Copernican system was no more accurate than the Ptolemaic system in predicting the positions of the planets because of a key factor unchanged from the Ptolemaic system.What was that factor?
A)The Copernican system assumed the Earth was at rest at the centre.
B)The Copernican system used elliptical planetary orbits.
C)The Copernican system used uniform circular motion.
D)The Copernican system assumed all planets orbited the Sun.

Question

Quizplus · Accepted Answer

The Copernican system retained the use of uniform circular motion, which limited its accuracy in predicting planetary positions, similar to the Ptolemaic system.

The Copernican System Was No More Accurate Than the Ptolemaic