[Vern (OP)]

I've been thinking of black holes in view of some observable mechanism that might prevent their forming. One speculative mechanism is that gravity is self-limiting. If gravity itself reacts to gravity the way energy and time react to gravity, it would be self limiting. The stronger the gravitational field, the more matter required to create it.

Now, if this were so, we would observe that the outer reaches of galaxies are more effective in producing gravity than the inner reaches of galaxies where the gravitational field is strongest. Such a condition would skew our calculations about the orbital speed of stars as they move in galactic orbit.  Stars with extra massive black holes would show the effect more than less massive galaxies.

This condition would prevent the singularity that plagues us as we ponder black hole formation.

[K.Margiani]

Hello Vern!
 I see you are in the quest of the truth.
We are insignificant part of the lots of recycling processes within endless universe
Dark (cooled invisible) matter can be formed after explosion of stars, black holes. This is remain after merging old spiral galaxies as well. Within merger galaxies dark matter is part of recycling process.  Remain dark mater by merger galaxies cam wandering within inter-galaxy medium for billion of years. At last it will be captured by another galaxy and will become part of next recycling processes once again.
Dark mater is temporary lost matter from life cycle of galaxies!

Good luck!

[Vern (OP)]

Yep; still trying to figure out the puzzle about what causes most galaxies to spin too fast. []