The gravitational constant is employed in Newton's Law of Gravitation as a proportionality constant. The universal gravitational constant, designated by G and measured in Nm^2/kg^2, is the force of attraction between any two unit masses separated by a unit distance. It is a gravitational physics empirical physical constant. Newton's Constant is another name for it. Everywhere in the cosmos, the gravitational constant has the same value as the universal gravitational constant. G is not the same as g, which signifies the acceleration due to gravity.