Originally posted by Rage.Of.Olympus
Thank you, but I think we're getting in the weeds, I'm simply addressing this as a durability feat. Usually, event horizon = very bad, for black holes.In this particular issue, the Event Horizon is implied to be the danger zone. And Jon's black hole gun forced the event horizon to expel and repel matter. That implies that if the planet crossed the event horizon, it would be bad. Probably crushed. Or perhaps lost if we assume the black hole is big enough that the planet would cross intact, but then, is it a durability feat anymore?
What is the significance of crossing the event horizon if the black hole is in-fact small? Does it become even more intense?
Locally (i.e. at short enough distances), the event horizon doesn't affect an object in any way. If we assume that the falling observer is in a box so that he cannot see the outside world, i.e. he can only make local observations within the box, he wouldn't even notice when he crosses the horizon. He'd be in free-fall and thus his space-time would be locally
Minkowskian just as if he was sitting in an empty space, in accordance with Einstein's
equivalence principle.
https://en.wikipedia.org/wiki/Local_reference_frameThe event horizon signifies a boundary beyond which there is no return. Once an object has crossed it, the space-time has become so "warped" that all of the object's possible futures (i.e. its every possible future world-line) end up in the singularity.