I have no idea what determines gravity. That is the goal, but stating that I do understand gravity would be to ride the currents of insanity. Like what most mainstream scientists do and other con artists who ridicule others into oblivion.

If anything it has to do with the preservation of angular momentum because at the center of stars there is no pressure induced by gravity because the vectors are cancelled. Essentially if there were a giant air bubble in the dead center of the Earth you could float and travel the exact velocity as the Earth does around the Sun. lol