> Do they grow outward from a point? A true mathematical point, or a tiny by finite highly curved region? The latter, where "tiny" for a stellar black hole is

> Do they grow outward from a point? A true mathematical point, or a tiny by finite highly curved region? The latter, where "tiny" for a stellar black hole is on the order of kilometers. > Does the observer's perspective matter? I.e.: is there a scenario where from one frame there is a black hole seen but from another frame it's just very dense stuff? An outside observer will never actually see light emitted at the moment the black hole forms: the infalling matter will just appear more and more heavily redshifted until it becomes undetectable.