Hi double-a You just about answered your own question by bringing in
great distance from us. I could add that white holes are say no bigger
object than our Moon. Small and far. The main thinking of my post was
ways to reach a critical mass. There are many ways that I see nature
doing this. Not just more mass compressed by gravity over long periods
of time. Heavy objects can merge into one Increase in spinning speed
creates greater inertia Best to keep in mind a spinning object is
continually changing direction,and changing direction is another way to
increase inertia. Bert