Which development was the first major change to the ancient models of the solar system? A The placement of the sun at the center of the solar system.

B The placement of some planets closer to the center of the solar system

C The choice to make elliptical rather than circular orbits

D The choice to place stars far from earth

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Explanation:

1.the placement of the Sun at the center of the solar system

2.stars are not a part of our solar system

3.The improve telescope showed scientists that the solar system contained comets.

4.the placement of the Sun at the center of the solar system

5.stars that form constellations

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