|
Maybe you're thinking of this the wrong way - because we can readily image clusters maybe our brains automatically intuit that's what's present. Additionally we aren't seeing these clusters in motion (centrifugal force + spacetime expansion defying gravitational collapse).
So to my first point - imagine space is full of atomic Hydrogen, now let say 1/5 th of this matter gravitationally collapse, becoming increasinly opaque and visible to us - particularly if it collapses into a star. The rest of the massive - but diffuse cloud of hydrogen that hadn't yet collapsed would have a significant gravitational effect retarding the further collapse of the gravitational bound cluster (and imparting inertia I guess).
Now all this matter has residual momentum and kinetic energy from the big bang itself - gravity has to overcome this force too.
Finally non gravitationally bound spacetime is generally expanding - so the space between filaments in super cluster must be expanding - which again would complicate any general gravitational collapse scenario.
Great thread!
|