http://www.phy6.org/stargaze/Sgravity.htm
Newton's theory of "Universal Gravitation"
And where is the Theory of Gravity in that page? I see the Laws of Gravity described quite well, but no explanation for the existence of gravity or mechanistically how it come into being. Newton simply derived the equations that predict the observed force, but do not explain the origin of the force. And, technically, Newton was proven wrong by Einstein.