: Gravity is Gravity, lightspeed is a constant. The two are some what different and apparently obey diferent laws with different causes. There is thought to be some underlying law in the universe that makes the value of the Gravitational constant G, the permittivity and permeability of free space, lightspeed c and other constants the values they are. These are called Grand Unified Field theories and at the moment do not explain WHY the Universe is the way it is.

---a GUT which predicts the G constant??? ---GUT's handle nuclear & electromagnetic forces - ---not gravity. dreams of a final theory => ---dreams!! it is yet unknown what form quantum ---gravity will take. ---also: SCIENCE never was and never will be our ---gateway to the WHY. never. Even Cosmology ---obey this rule; Plus-- the seperation of ---the speed of light from gravity is not in place --- Ask Einstein !!