Any attempts to explain this stuff to the non mathematician / non physicist seems very difficult,but you do a good job. In any case, I wonder about several things. 1) gravity seems to be slightly different than on this pear shaped planet, so how is this adjusted for? 2) to end earth bound bias, have there been any attempts to measure the constant on the Moon or on Mars? 3) what about measurements from orbit in zero G or near zero G? 4) how does the confirmation of the graviton help or hurt this inaccuracy? 5) is the uncertainty we have here related to our failure to come up with a real “unified” theory?