Starship Asterisk*

Thanks to everyone who attempted to answer my question "How fast does a black hole collapse?” I have been otherwise occupied for the past couple of years, and would like now to re-open the debate. As I mentioned in my initial question, my maths are not up to scratch, so I have been taking some ...

Thanks’ Rob, but I guess what I really want to know is how rapidly the inner core collapses. I will go check the website you recommended, if that doesn’t give me the answer maybe we can discuss the matter further. Once again, thanks.
Greta website.

What I am curious to know is how fast does a black hole collapse? Since gravity is distorting spacetime and it is spacetime that is collapsing and not mass moving through spacetime is there any limit to the "inward velocity" of the collapsing event horizon? I do have a good reason for want...