Gravitational attraction is the force that draws two objects together. It is governed by the law of universal gravitation, which states that the force of attraction between two objects is related to the mass of the objects and inversely related to the distance between the two.
Gravitational attraction also governs the movement of celestial bodies. Gravity keeps the planets in orbit around the sun and the moon around the Earth. This force gives rise to the tides when the moon's gravity pulls on the Earth. The escape speed of a rocket is dependent on the gravitational pull of Earth; a rocket must reach a certain speed before it can overcome Earth's gravity. The escape speed for Earth is 11.2 kilometers per second.