 Newton raised this point in order to show that the possibility of such a force acting on the whole solar system would not affect his calculations of the forces acting within the system. In the calculation relevant to this passage, Newton was using Corollary VI to defend the inference that the force responsible for Jupiter’s orbit is directed to the Sun rather than to the Earth: neglecting any such imaginary force, “then all the remaining force by which… Jupiter is urged will tend (by prop. 3, corol. 1) toward the center of the sun” (ibid). This calculation formed an important step in the argument for a heliocentric system. Such a use of Corollary VI parallels, therefore, his use of Corollary V (and its earlier form, “Law 3”) to show that the “frame of the system of the world” could be determined without regard to the system’s uniform motion in absolute space. 