Absolutely. Two balls, same size, one of rubber and one of lead, dropped off the Leaning Tower of Pisa at the same moment will hit the ground at the same time. Now, two balls, both rubber, one larger than the other, dropped off the Leaning Tower of Pisa at the same moment. This time the larger one hits the ground first. Finally two balls, choose your material, the smaller heavier than the larger, dropped off the Tower of Pisa at the same moment. The result: the larger and lighter one hits first. The attraction of this miraculous event is calculable at the rate in the above equation. This force, which you can call anything that you like, is provable and measurable and abides by certain rules. Unless you want to contend that the sun is very small, it becomes untenable for the sun to rotate around the earth.