According to his calculations, this force is proportional to the product of the two masses and inversely proportional to the square of the distance which separates them. Newton would then use these principles to account for the trajectories of comets, tides, precession of the equinoxes and other astrophysical phenomena. This effectively removed the last doubts about the validity of the heliocentric model of the cosmos according to which the Sun (and not the Earth) was at the center of the planetary system. His work also demonstrated that the movement of objects on Earth and of celestial bodies could be described by the same