Question
Which TREE statements are correct features of Copernicus's model of the solar system?
A. The planets move in perfect circles
B. The outer planets move in epicycles.
C. The stars are fixed to an outer sphere.
D. The Sun is at the center of the model.
E. Earth is fixed to a crystalline sphere.
F. All planets orbit the Sun at the same speed.
A. The planets move in perfect circles
B. The outer planets move in epicycles.
C. The stars are fixed to an outer sphere.
D. The Sun is at the center of the model.
E. Earth is fixed to a crystalline sphere.
F. All planets orbit the Sun at the same speed.
Answers
Answer
Pick THREE
Answered by
GPT-4o mini
In Copernicus's heliocentric model of the solar system, the following statements are correct:
C. The stars are fixed to an outer sphere.
D. The Sun is at the center of the model.
The other statements are not accurate features of Copernicus's model:
A. The planets move in perfect circles - While Copernicus believed the orbits to be circular, he later acknowledged that the planets did not move in perfect circles, but this circular motion was an initial assumption based on the knowledge of the time.
B. The outer planets move in epicycles - Copernicus did not use the concept of epicycles as extensively as Ptolemy; however, he did recognize that the paths of the planets could be more complex than simply circular.
E. Earth is fixed to a crystalline sphere - In Copernicus's model, Earth is not fixed; it is one of the planets orbiting the Sun.
F. All planets orbit the Sun at the same speed - This is incorrect; Copernicus proposed that the planets move at different speeds depending on their distance from the Sun.
So the correct answers are **C and D**.
C. The stars are fixed to an outer sphere.
D. The Sun is at the center of the model.
The other statements are not accurate features of Copernicus's model:
A. The planets move in perfect circles - While Copernicus believed the orbits to be circular, he later acknowledged that the planets did not move in perfect circles, but this circular motion was an initial assumption based on the knowledge of the time.
B. The outer planets move in epicycles - Copernicus did not use the concept of epicycles as extensively as Ptolemy; however, he did recognize that the paths of the planets could be more complex than simply circular.
E. Earth is fixed to a crystalline sphere - In Copernicus's model, Earth is not fixed; it is one of the planets orbiting the Sun.
F. All planets orbit the Sun at the same speed - This is incorrect; Copernicus proposed that the planets move at different speeds depending on their distance from the Sun.
So the correct answers are **C and D**.
Answered by
GPT-4o mini
Based on Copernicus's heliocentric model, the three correct statements are:
**C. The stars are fixed to an outer sphere.**
**D. The Sun is at the center of the model.**
**B. The outer planets move in epicycles.** (While Copernicus did not emphasize epicycles as strongly as Ptolemy, he acknowledged their existence concerning the behavior of planets.)
So to clarify, the three correct statements would be **B, C,** and **D**.
**C. The stars are fixed to an outer sphere.**
**D. The Sun is at the center of the model.**
**B. The outer planets move in epicycles.** (While Copernicus did not emphasize epicycles as strongly as Ptolemy, he acknowledged their existence concerning the behavior of planets.)
So to clarify, the three correct statements would be **B, C,** and **D**.
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