If you take a neutron star on its own, I posit that the curve associated with its mass could be measured as an angle.


Here, it's total addition to the curvature of space is angle (a).

Now if you make a model where there are three such neutron stars, set in a closed but unbound system, than all their angles must add up to 360degrees.



The locations of matter are associated with the presence of space curvature, but note that there has to be curvature, due to it being a closed system..So to me the relationship between curvature and the presence of matter is unclear.....does matter curve space, or does space create matter.....they are certainly associated with each other, but the root cause of both might be that there is a closed system.

What determines the locations of matter, and curvature must have a cause somehow...the distribution of curvature isn't even.

One thing I think looking at the second diagram is that (a) which is set further away from (b) and (c) seems to be set in a deeper curvature....maybe this causes (b) and (c) to move apart(ie perhaps 'falling' towards (a)).....the system might tend to move towards a state where the curvature is more evenly distributed then.

Maybe the shortest path to a more evenly distributed curvature is for the whole system to expand, while you also have more localised movement.

If this model represents the actual universe, then that would mean that Hubble's Constant will not be the same at all locations of the system...Hubble's curve would be proportionate to the level of local matter/curvature, compared with the curvature/matter presence of a universe with an even distribution.