When Copernicus first created his Sun-centered model of the universe,it did not lead to substantially better predictions of planetary positions than the Ptolemaic model.Why not?
A)Copernicus misjudged the distances between the planets.
B)Copernicus misjudged the speeds at which the planets orbit the Sun.
C)Copernicus placed the planets in the wrong order going outward from the Sun.
D)Copernicus placed the Sun at the center but did not realize that the Moon orbits Earth.
E)Copernicus used perfect circles for the orbits of the planets,whereas planets actually have elliptical orbits.

Question

Quizplus · Accepted Answer

Copernicus assumed that the planets moved in perfect circles around the Sun, when in reality they have elliptical orbits. This led to inaccuracies in predicting planetary positions. It wasn't until Kepler later refined Copernicus's model with his laws of planetary motion that more accurate predictions were possible.

When Copernicus First Created His Sun-Centered Model of the Universe,it