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Unraveling Retrograde Motion in Astronomy

Explore the fascinating history of retrograde motion in astronomy, from Ptolemy's epicycles to Copernicus' revolutionary model. Discover how planets appeared to move westward and the shift from the geocentric to heliocentric view of the solar system.

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Unraveling Retrograde Motion in Astronomy

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  1. Retrograde Motion https://youtu.be/72FrZz_zJFU

  2. Epicycles Introduced to explain retrograde (westward) motion of planets The Ptolemaic system was considered the “standard model” of the Universe until the Copernican Revolution.

  3. Ptolemy explained this motion using a geocentric (Earth-centered) model of the solar system in which the planets orbited the Earth indirectly, by moving on epicycles which in turn orbited the Earth.

  4. Retrograde motion

  5. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  6. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  7. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  8. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  9. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  10. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  11. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  12. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  13. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  14. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  15. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  16. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  17. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  18. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  19. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  20. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  21. Retrograde motion (Copernicus) http://www.lasalle.edu/~smithsc/Astronomy/retrograd.html

  22. https://youtu.be/72FrZz_zJFU

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