In my previous post (14), Mercury is divided into two spheres. But this thought experiment doesn’t seem to explain perihelion shift of Mercury. Because, a/49^2 + a/51^2 = 2a/50^2. Surprising ! And also, it does not disprove Newton’s spherical shell theorem ! So, my hope is shifted in another thought experiment on centrifugal force (2023-03-15).
