<aside> 💡 The universal law of gravitation states that the force of gravitational attraction between any two objects is as follows: $F_g = \frac{Gm_1m_2}{r^2}$

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• The gravitational constant, $G = 6.67 * 10^{-11} \frac{N*m^2}{kg^2}$, was first determined experimentally by Henry Cavendish in 1798
• The gravitational field can be represented by a vector at each point in space
• A gravitational field exerts forces on objects with mass
• The gravitational field strength at a distance $r$ from a body of mass $m$ equals the magnitude of gravitational acceleration at that distance: $g = \frac{Gm}{r^2}$