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English: The motions that produce retrograde motion. As Earth passes a superior planet, such as Mars, the superior planet will temporarily appear to reverse its motion across the sky.
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Author Brian Brondel

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8 February 2007

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Date/TimeThumbnailDimensionsUserComment
current19:24, 8 February 2007Thumbnail for version as of 19:24, 8 February 2007320 × 230 (46 KB)Brian BrondelThe motions that produce retrograde motion. As Earth passes a superior planet, such as Mars, the superior planet will temporarily appear to reverse its motion across the sky.

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