GRAVITY        :

               Relatively very weak very long range universal

               attraction (AFFINITY) between any two bits of

               MATTER in the UNIVERSE. Isaac Newton, after

               reading an obscure BOOK by Johannes Kepler,

               which Galileo was silly enough NOT to read,

               proposed GRAVITY to explain the movement of

               planets around the SUN. In modern parlance we

               might put it like this: F=Gm1m2/r2 in other

               words, the force F (in newtons) between any two

               bits of MATTER of MASSes m1 AND m2 (in kg) is

               proportional to their MASSes (in kgs) AND

               INVERSEly proportional to the square of the

               distance r (in METREs) between them, where G is

               the gravitational constant of proportionality.