What's more important with gravity, apollo, is that you seem to forget that it is not the body/mass of the sun which anchors the earth to it ... but, rather, the CENTER OF MASS OF THE ENTIRE SYSTEM that serves as the frame of reference. Consequently, it's the center of mass of the entire solar system around which all the bodies in the solar system ... INCLUDING THE SUN ITSELF ... are said to revolve. This is usually located somewhere within the physical boundaries of the sun itself, but not always, and were you to introduce another massive planet or two into the system, the center of gravity would not be located within the sun.
Now expand out to the galaxy and to the universal. There's only ONE SINGLE POINT, from the perspective of gravity, in the entire universe that could be said to be stationary, and that would be the center of mass of the entire universe. Now, who knows where that happens to be physically, but no one can prove that it does not happen to be located within the physical confines of earth.