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Copernicus and Retrograde Motion I

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Uploaded by on Jan 3, 2008

This animation shows how Copernicus's heliocentric model could reproduce planetary retrograde motion for a superior planet (i.e. a planet whose orbit lies outside of earth's orbit).

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Education

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Uploader Comments (mrg3)

  • i still dont get it

  • If you track the position of the planets amongst the constellations, the planets usually move eastward but occasionally do a temporary westward motion called retrograde motion. In the case of mars, this apparent "backwards" motion happens when earth passes mars as they both orbit the sun.

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  • Ah, i remember the epicycles. they used to make me chuckle! :D

  • thnx I understand fully I already got many answers from yahoo and other sources too. it is kinda confusing.

  • This Is Another Cool Space Video

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