One can extrapolate the astronomical relations from the latter half of Nothing But Motion, regarding chemical bonds, but here is a simplification to get the general idea. There are three components that come into play:
- The progression of the natural reference system, the "default" condition of the Universe that wants everything to fly apart at the speed of light (outward, scalar motion), from atoms to galaxies. This is observed astronomically as the "Hubble Expansion."
- Gravitation, a linear, inward pull in 3D space that originates from the temporal rotating systems of atoms. Gravity wants to do the opposite of progression: pull things together at the speed of light.
- The Gravitational Limit (unit space boundary of atoms), where the effect of gravity has dropped below one, natural unit and therefore can no longer have an inward effect on the default, outward progression of motion. Note that the RS is "discrete" or quantized... speed is taken as a "floor" function (truncate the fractional parts), so once you hit 0.999, you are at zero. This means that gravitation is not infinite--it has a limited range.
To aid in understanding, I came up with this simple analogy: In this example, the river is flowing downhill from a mountain, so the further up you go, the faster it flows. This is analogous the the progression of the natural reference system and why we see "galaxies" moving closer to the speed of light, the further away they are.
You can only paddle so fast, so the further you go upstream, you will eventually be stopped by the increasing rate of flow of the river and will not be going anywhere. If you start to drift downstream, each stroke of the paddle has more effect (river is flowing slower), pushing you upstream, back to that point where you go nowhere, fast.
It is that simple. (And I'm kidding about the gravitational wave generator... )