Question

Copernicus believed the planetary motions were due to:

circular heliocentric orbits
elliptical heliocentric orbits
elliptical geocentric orbits
circular geocentric orbits

Answer 1

Copernicus's model positioned the Sun at the center of the Universe, motionless, with Earth and the other planets orbiting around it in circular paths, modified by epicycles, and at uniform speeds.

Step-by-step explanation:

Answer 2

(a) circular heliocentric orbits

Copernicus's model positioned the Sun at the center of the Universe, motionless, with Earth and the other planets orbiting around it in circular paths, modified by epicycles, and at uniform speeds.