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senormonje t1_j28rk2l wrote

Reply to comment by WittyUnwittingly in Black hole question by Impossible_Pop620

Strange. In that case does being inside the event horizon isolate a given piece of matter (prior to becoming part of the singularity) from outside gravitational influences, no matter how strong... even another black hole? Is this because of the propagation speed of gravity?

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WittyUnwittingly t1_j29rhr0 wrote

As far as I know, everything, once it crosses the event horizon, is causally disconnected from the exterior. (I. E. There is nothing you can do from the outside, that will affect the inside)

I don't think any special physics are required to explain this other than general relativity. Any changes you make to a black hole cannot fully manifest until the end of the universe. So I guess you COULD gravitationally distort an event horizon, but from the perspective of someone inside, the distortion happens at the same time as everything else (which is all happening at once) at the end of the universe.

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