Retrograde and prograde motion

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Notion

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Science and technology

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What Wikipedia says

Retrograde motion in astronomy is, in general, orbital or rotational motion of an object in the direction opposite the rotation of its primary, that is, the central object (right figure). It may also describe other motions such as precession or nutation of an object's rotational axis.

Excerpt from the Wikipedia article “Retrograde and prograde motion”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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