On Friday, February 9, 2018 at 2:06:14 PM UTC-8, Gerald Kelleher wrote:
palsing

Unlike people who recognize the worth of a work when it is in front of them, it just doesn't happen here so when you encounter Galileo description of the direct/retrograde loop of Venus as an illusion due to the orbital motion of the Earth, you should pay attention to why the issue was difficult for the original Sun centered astronomers but not now.

The phases of Venus dictate not only size increases but also that the Sun is central hence the only permissible loop seen from Earth -

http://www.insideastronomy.com/uploa...0_7_128459.jpg

The intuitive faculties extend this to the role the Earth's orbital motion plays out in this scenario so it makes use of the Sun as a central reference for the transition of the background stars from an evening to morning appearance -

https://www.youtube.com/watch?v=eeQwYrfmvoQ&t=12s

Mathematical minds tend to squander intuitive insights although no person, not even you, are without some sense of perspective insight. You should leave these threads alone and stick with the giddy rotating sphere of stars that clouds the judgment of so many or that I have to hear some obligatory meaningless or worthless stock phrase or slogan.

"To realize that you do not understand is a virtue; Not to realize that
you do not understand is a defect."
- Lao Tzu