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

Question

Responses

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

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

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

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

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

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.

These elements reflect the heliocentric model proposed by Copernicus, where the Sun is the central point of the solar system, planets revolve around it, and the stars remain fixed in the celestial sphere. However, it's worth noting that while Copernicus did propose circular orbits, later observations showed that planet orbits are elliptical.