Gravitation

Gravitational Constant: $G=6.67430\times 10^{-11}N{m}^{2}k{g}^2$ $F=G\frac{m_1{m}_2}{r^2}$ Binary mass equation: $\Sigma M=\frac{4{\pi }^2(r_A+r_B{)}^3}{G{T}^2}$ Gravitational potential energy (when distances are changing a lot): $U=\frac{-G{m}_1{m}_2}{r}$