# Law of Universal Gravitation

The law of universal gravitation relates the attractive gravitational force _{G}

_{G} = -GMm/r2

Where ‘G’ is the universal gravitational constant. This result was derived by Sir Isaac Newton in his 1686 publication *Philosophiæ Naturalis Principia Mathematica.* This law implies that **all objects with mass in the universe are attracted to one another**.

**Figure 1:** Schematic of gravitational forces acting between objects with masses m and

Here you can read how Newton derived his law by simple observation of the night's sky.