Earlier quoted context omitted.
anvay could not have downvoted you, as your comment was a reply to them, so no, they didn't downvote you for that. And then in reply to what you said: >> It is locally convex in the sense >> that it has no loops > Of course it has loops. But in the > scale of the drawing, the loops are > lost due to the vast distance from > Earth/Moon system to Sun. By my way of thinking, this is wrong. Looking at this from the Sun-c…
Are you saying that retrograde motion would not be observed from the Sun's perspective?
Speed of Earth in orbit ~ 150 * 10^9 * 2 * pi / 365.25 / 86400 ~ 30 km/sec
Speed of Moon in orbit ~ 400 * 10^6 * 2 * pi / 27.32 / 86400 ~ 1 km/sec.
Yes, I'm saying that retrograde motion would not be observed from the Sun's perspective.