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
How can Planets be in Retrograde? Geocentrism Explained
How Does Retrograde Motion Work?
Exploring the Ptolemaic System: How the Geocentric Model Shaped Ancient Astronomy
Geocentric vs Heliocentric Model of the Universe
Mercury retrograde, explained WITHOUT astrology
What is Planetary Retrograde. A Complete Description. (In under 3 minutes).
Retrograde Motion
Ch03C Heliocentric Model Retrograde Motion
Copernican Explanation for Retrograde Motion
retrograde motion & phases of Venus in the geocentric Solar System model
Retrograde Motion and the Copernican Explanation
retrograde motion & phases of Venus in the heliocentric Solar System model
ASTR 1P01, CLIP 56: Epicycles; Retrograde Motions in the Geocentric and Heliocentric Models