Gravitational forces depend on the distance between the two point masses. However, for an extended object like the Earth, the Sun's gravitational force acting on the side facing the Sun is higher than that on the other side. If Fg is the average gravitational force acting at the Earth's center, the difference in forces gives rise to tidal forces. The resultant forces at A and B are directed away from the Earth's center. Forces acting at C and D have different directions. Hence, the resultant forces at these two points are directed towards the Earth's center. Therefore, the resultant residual forces squeeze the Earth into an oblate sphere. Since most of the Earth's surface comprises oceans, this effect is prominently seen as a pair of high tides and low tides. The effect of tidal forces on the Earth due to the Moon is approximately 2.2 times stronger than that due to the Sun, because of the proximity and comparable size of the Moon.