Holiday Readings at

The Other Gravitational Formula (.pdf)

This fairly complex piece of calculus derives the equation for gravity within the volume of a homogeneous sphere. It clearly shows that the standard Newtonian gravitational formula is insufficient to use within the volume of bodies without integration.

I wrote this paper after reading in my college astronomy textbook that gravity increases toward the center of stellar masses. Pressure might increase, but gravity does not, as this equation proves.