According to Ptolemy's Model,a Planet Undergoing Retrograde Motion on the Sky

question 30

Multiple Choice

According to Ptolemy's model,a planet undergoing retrograde motion on the sky would be moving on its epicycle:

• A) in the opposite direction to the orbit of the epicycle's center.
• B) in the same direction to the orbit of the epicycle's center.
• C) away from Earth.
• D) toward Earth.

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