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Impossible_Pop620 OP t1_j27902x wrote

Reply to comment by senormonje in Black hole question by Impossible_Pop620

Presumably the event horizon would drag everything with it as it 'moved' is the pessimistic answer everyone fucking loves

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PhobosDown t1_j27c8hd wrote

Yep. The people who run relativistic simulations of black hole mergers check whether there’s any point at all where a bit of information that was once inside one event horizon can escape, and the answer so far has been no. It’s a good question though and we weren’t super sure until we checked.

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WittyUnwittingly t1_j27dpjt wrote

Well I think the issue is that the event horizon is not a thing to be moved or deformed. You can deform spacetime, which necessarily deforms your event horizon, but everything else (the origin of your pulse, for example) is also sitting at a specific point in spacetime, which is now deformed.

But also, from the perspective of "the inside" of the event horizon, there would be no direction you could choose that would take you out. It's less about something really strong pulling you backward, and more like reality itself has warped to the point of isolating you from the outside universe. What direction do you point your signaling device, when no direction is "outward?"

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senormonje t1_j28rk2l wrote

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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Charlemagnea t1_j288ipc wrote

I'm sorry science doesn't love supporting your feelings over actually being right

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Impossible_Pop620 OP t1_j28iu2u wrote

I'm with you on that, but this was only a conversation about hypothetical possibilities on something we don't understand, not something I've got my heart set on.

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