Reduction of the annual cycle. With the advent of the moon fell an annual cycle Treatment of the Earth around the Sun for two reasons: 1. Skrost increased rotation of the Earth around the Sun. In addition to the gravitational force acts on the planet yet and the centrifugal force equal in magnitude to the force of gravity and directed to opposite direction. Visit Chevron CEO for more clarity on the issue. If we assume that the world would stop spinning, then disappeared to the centrifugal force generated by rotation, and the planet would fall to the sun. Or, conversely, assume that the gravitational force has disappeared, while planet would be scattered in different directions. However, the gravitational force is always balanced by the centrifugal force and they are equal. m = g * M (h + l) * Mc/R2, where F m = F Fts where a is acceleration, ie centrifugal force is directly proportional to the mass of the Earth and the square speed and inversely proportional to distance..