Look, maybe you got me wrong.
I am not opposed to your claim, I must stated like "ok, we can't prove if earth moves or sun or both, nobody proved a fix point somewhere till today."
Now my question was: why does it matter? What changes if something is fix? Fix to WHAT? The anchor of the universe?
I just want to know what your point is - there has to be some conclusion.
I mean, you don't post obvious things without some conclusion or something?
I am not here to try to prove your claim wrong (because it's not wrong), I want to know what's so special about it? why does it matter?
Or do I just miss the point? (English it's not my native language, after all)