Question

How does the concept of retrogration reinforce the heliocentric model of the the solar system?

It shows that Earth is stationary and all objects rotate around it, therefore the Earth is the center of the solar system
It shows that planets change speed
It shows that all planets move in elliptical orbits
It shows that the Earth must be moving and is therefore not the center of the solar system

Answer 1

The concept of retrogradation reinforces the heliocentric model of the solar system because it shows that the Earth must be moving and is therefore not the center of the solar system.

Retrogradation is an astronomical concept that refers to the movement of the planets in a direction opposite to that of other bodies within their system.

Therefore, it can be inferred that this concept reinforced the heliocentric theory (the theory that states that the sun is the center of the solar system) because it shows the movement of the Earth so it can be inferred that it is not the center static of the universe.

According to the above, the correct answer is D. because it raises the correct theory about the movement of the earth.

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