If a solar sytems overall gravity generated going out from the system was one mesurement and the weight of those bodies acting on one another had to be taken into accout for the weight of the sytem in relation too abient gravity from the universe and galaxy making the solar system lighter in that direction of gravity.
Perhaps to as light travels outward in to the void it becomes lighter something relating to the ratio between pull and ones own weight saying that the level of vaccumness effects how much light curves off and how much it stays stable in it's higher frequency. 13.7billion years is a level of scope not the starting of anything. what you could model in a higher dimension is a system that goes 3d wise flat when density relating to turbulence is low and how it goes ff 90 degrees in the next dimension in a black hole. also how spurting galaxies align with one another is quite turbulent when gaining there slice in 4d of the death and rebirth of galaxies. then take this model and have 2d galaxies and other forms in 2d travversing 3d space to add to quantum mechnics.