The force of gravity within our solar system is the force that pulls all the celestial bodies towards each other. It is the force that keeps the planets orbiting around the sun and the moons orbiting around their respective planets. The force of gravity becomes weaker as the distance between two objects increases. Therefore, the gravitational force acting between the sun and the planets is stronger due to their close proximity, whereas, the force of gravity between two distant planets is weaker. The gravity of other celestial bodies such as comets, asteroids, and moons also exert a gravitational influence on each other, but these forces are typically much weaker than those exerted by the massive planets or the sun within our solar system.