[bencyoung]

From what I remembe of Undergrad physics this isn't actually possible. According to GR, within an event horizon, space-like pths become "time-like" which effecitvely means the singularity is unavoidably "in the future". No matter how big a black hole is, you can't just drift around inside it as literally all paths lead downward (hence even light not escaping)

If you were inside a black hole you wouldn't be able to see light from "deeper" because it wouldn't be able to travel towards you.

This is not what we see within the universe, so I don't think we can be inside a black hole

[kadoban]

All paths _eventually_ lead downward. Is there any limit to how long? Can't we just be near the outside of the blackhole and can't see the doom yet?

[bencyoung]

There are no stable orbits inside the event horizon, and my understanding is even things like atom vibration can't move further from the sigularity so I'm guessing timespans would be limited!

[kadoban]

Interesting, thanks. That does sound like you could tell from inside if you there or not.

I'll have to read up on that, I always had the vague sense that on ~finite scale of time there existed a region of space where you couldn't really tell the difference if you're inside of a big enough black hole or not.

Which sounds like I'm probably just wrong.

[bencyoung]

It's the usual rabbit hole if you search for it, but there are some useful comments here: https://astronomy.stackexchange.com/questions/58610/would-it...

The way I see it is every surface inside an event horizon is another slightly "stronger" event horizon