The MOST serious flaw in the solar system model of Copernicus was
A) Earth was at the center of the system.
B) the orbits were circular rather than elliptical.
C) it failed to take precession into account.
D) it failed to take retrograde motion into account.

Question

Quizplus · Accepted Answer

The most serious flaw in Copernicus's model was that it assumed the orbits of the planets were circular, rather than elliptical. This assumption led to inaccuracies in predicting the positions of the planets. Johannes Kepler later corrected this flaw by proposing that planets move in elliptical orbits.

The MOST Serious Flaw in the Solar System Model of Copernicus