Gravitational Constant – The Gravitational Constant also known as the Universal Gravitational Constant, Newton’s Constant and informally as The Big G is involved in Newton’s law if gravitation that states that the attractive force (F) between two masses (m₁) and (m₂) a distance (l) apart is given by, . The value of (G) is generally difficult to determine; in c g s  units . Compared with electrical and magnetic forces, gravimetric forces are much weaker at least when the particles have a significant distance between them. At atomic distances the inverse square law may break down as it does with electrical charges and magnetic poles so the relative magnitude of the forces involved may be somewhat uncertain.

Further Information on this Topic can be found in the books of R.P.W. Scott by following the listed links