ABSTRACT
All bodies exert gravity. It is the only primal force of nature that technology never managed to nullify, the only one that exerts only attraction, and the only one that remains effective even at infinite distances. The force that attracts an object to the ground is the same that keeps the Earth in orbit around the sun. The reason for this is that although both celestial bodies exert a force of attraction, the sun, by being a body of greater mass, exerts a greater attraction than the gravitational pull of the Earth. The result is a natural balance between both gravitational centers. Similarly, the gravitational force of the Earth is greater than the force of attraction that buildings exert upon it: the body of greater mass attracts the smaller one. It is a law of nature.
