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

Question

Responses

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

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

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

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

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

The planets move in perfect circles.

Answer 1

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

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

Copernicus proposed a heliocentric model where the Sun is at the center of the solar system, and the planets (including Earth) orbit around it in circular paths. The idea of stars being fixed to an outer sphere was also part of his conception, although later models revised the understanding of stars and their distances.