Definition. According to Newton's law of universal gravitation, the attractive force (F) between two point-like bodies is directly proportional to the product of their masses (m1 andm2), and inversely proportional to the square of the distance, r, (inverse-square law) between them: ... κ = 8πc4G ≈ 2.071×10−43 s2⋅m−1⋅kg−1.
