In Ptolemy's geocentric model, the retrograde motion of a planet occurs when (a) Earth is about to pass the planet in its orbit around the Sun; (b) the planet actually goes backward in its orbit around Earth; (c) the planet is aligned with the Moon in our sky.

Question

Salvador Hoffman

Geography

7 December, 14:30

In Ptolemy's geocentric model, the retrograde motion of a planet occurs when (a) Earth is about to pass the planet in its orbit around the Sun; (b) the planet actually goes backward in its orbit around Earth; (c) the planet is aligned with the Moon in our sky.

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Answers (1)

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Rachael Downs · Answer 1

B. the planet actually goes backward in its orbit around Earth

Explanation:

The term retrograde motion is used to refer to the backward movement of the earth at its orbit.