Which are features of Copernicus's model of the solar system? Select the three correct answers.(2 points)

Question

Responses

All planets orbit the Sun at the same speed.
All planets orbit the Sun at the same speed.

Earth is fixed to a crystalline sphere.
Earth is fixed to a crystalline sphere.

The stars are fixed to an outer sphere.
The stars are fixed to an outer sphere.

The Sun is at the center.
The Sun is at the center.

The planets move in perfect circles.
The planets move in perfect circles.

The outer planets move in epicycles.
The outer planets move in epicycles.

Answer 1

The three correct features of Copernicus's model of the solar system are:

1. The Sun is at the center.
2. The planets move in perfect circles.
3. The stars are fixed to an outer sphere.

(Note: While Copernicus's model did imply epicycles, it was more in line with the Ptolemaic system's approach for some planet motion. However, the focus of his heliocentric model emphasizes the Sun's central position and circular orbits rather than epicycles.)