Which are features of Copernicus's model of the solar system? Select the three correct answers.
Responses:
a) All planets orbit the Sun at the same speed.
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b) Earth is fixed to a crystalline sphere.
c) The planets move in perfect circles.
d) The outer planets move in epicycles.
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e) The stars are fixed to an outer sphere.
f) The Sun is at the center.
c) The planets move in perfect circles.
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e) The stars are fixed to an outer sphere.
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f) The Sun is at the center.
The features of Copernicus's model of the solar system are:
c) The planets move in perfect circles.
d) The outer planets move in epicycles.
f) The Sun is at the center.