Apparent Retrograde Motion (Visual Explanation)
History of Astronomy Part 3: Copernicus and Heliocentrism
Heliocentrism and Geocentrism
An animation to explain the (apparent) retrograde motion of Mars, using actual 2020 planet positions
Geocentric Explanation for Retrograde Motion
Heliocentric Retrograde Motion Explained Animation
What is Planetary Retrograde. A Complete Description. (In under 3 minutes).
Geocentric vs Heliocentric Model of the Universe
Ptolemy vs. Copernicus: Which Model of the Universe Was Right?
How Does Retrograde Motion Work?
How can Planets be in Retrograde? Geocentrism Explained
Retrograde Motion
Mercury retrograde, explained WITHOUT astrology
retrograde motion & phases of Venus in the geocentric Solar System model
Ch03C Heliocentric Model Retrograde Motion
retrograde motion & phases of Venus in the heliocentric Solar System model
Copernican Explanation for Retrograde Motion
Retrograde Motion and the Copernican Explanation
Heliocentric Model: Quick Review