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Which are features of Copernicus's model of the solar system? Select the three correct answers.(2 points) Responses 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. The stars are fixed to an outer sphere. The stars are fixed to an outer sphere. Earth is fixed to a crystalline sphere. Earth is fixed to a crystalline sphere. The planets move in perfect circles. The planets move in perfect circles. The outer planets move in epicycles.

1 answer

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

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

(Note: While Copernicus did suggest that planets moved in circles and accounted for epicycles, the specific features you've given suggest "The outer planets move in epicycles" is not one of the three central features as directly attributed to his heliocentric model.)