Black hole cosmology suggests that the Milky Way and every other observable galaxy in our universe is contained within a black hole that formed in another, much larger, universe.
The theory challenges many fundamental models of the cosmos, including the idea that the Big Bang was the beginning of the universe.
It also provides the possibility that black holes within our own universe may be the boundaries to other universes, opening up a potential scenario for a multiverse.
Mine blown 🤯
You might like this video by PBS Spacetime. I’m not sure how this relates to your centrifugal force idea, but we do actually know a few things about “what gravity is” that are really interesting.
Oh, I’ve seen this before! Although my interpretation is purely spatial and lacks any temporal component aside from the act of rotation itself. So it’s still applicable.