WELL DUH. Read my post already. My statement is very simple: in Newtonian gravitation, with this two-body example, at large distances, a pretty fucking big quantitative difference shows between the ToEE and newtonian gravitation. I'm done explaining this, because it's become obvious to me that you either refuse to read my posts or refuse to give me a decent answer. Well yeah, but my point is that linear motion and expansion cannot explain these two "attractions" we observe accurately. You can say "Expansion, same constant, tralala" all you want but you're not gonna be able to explain the periodic motion of a system like sun-earth-moon. It simply can't be done, from what I can see. So in short, stop trying to give a first-year uni dynamics course and start actually reading the posts and giving a decent reply.