Retrograde motion is the apparent backwards motion that planets make as they travel across the sky.
Prior to the sun-centered model of the solar system, it was believed planets made loopty loops as they circled the earth.
The Copernican model explains this motion w/o loops. (1/2)
Prior to the sun-centered model of the solar system, it was believed planets made loopty loops as they circled the earth.
The Copernican model explains this motion w/o loops. (1/2)
Here's an actual time-lapse image showing what it looks like in the sky. (2/2)
📷starwalk.space/en/news/what-i…
📷ourvastuniverse.home.blog/2019/02/12/mov…
📷starwalk.space/en/news/what-i…
📷ourvastuniverse.home.blog/2019/02/12/mov…
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