Nick on Nostr: nprofile1q…u9s72 While I am a sometimes listener to Mindscape, I didn't listen to ...

nprofile1qyt8wumn8ghj7un9d3shjtnyd968gmewwp6kytcqyq4qlf8xhv377ax6z3adf755tlwp0aydc3h2mk779xazsemqlaw8qyu9s72 (nprofile…9s72) While I am a sometimes listener to Mindscape, I didn't listen to that specific AMA. I guess I would think that the early phase of the big bang is not all that analogous to a white hole in terms of its specific properties (for reasons nprofile1qyt8wumn8ghj7un9d3shjtnyd968gmewwp6kytcqyrj7vmtena97hded0cqwgs6heq8ddx9dc2kvd8vch7q9mgvdj3z67jx00p2 (nprofile…00p2) mentioned, and questions like "in that case where is the event horizon?"). I would think that the white hole might instead be an instructive example in the following sense: The time reversibility of GR together with the solution for a black hole tells us that a white hole must also be a solution; likewise, if we grant that a Universe uniformly filled with matter (that is initially contracting) can collapse to a singularity under gravity, then time reversal symmetry says that the initial expansion of the big bang must be possible.