Define Gravitational Constant

 The gravitational constant, denoted by 

 

G, is a fundamental physical constant that appears in Isaac Newton's law of universal gravitation and in Albert Einstein's theory of general relativity. It is commonly represented by the symbol 

 

G. The gravitational constant measures the strength of the gravitational force between two objects with mass. In Newtonian physics, it is defined as the proportionality constant in Newton's law of universal gravitation, which states that every point mass attracts every other point mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

The gravitational constant is approximately 

6.674×10−11m3/kg⋅s26.674×10 −11 m 3/kg⋅s 2

  in the International System of Units (SI units).