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Originally Posted by Guille I think that maybe you will always fall down, because for example, imagen a black hole grows and a star nearby enters the bh's horizon. Then, imagne the star is being pulled on the opposite way fro the bh, by a gravitational atraction, around a much bigger star. Then, the star would end up faling down to the bh. this is because the gravity produced by the bh is much bigger than the one produced by the big star, or than enything else in the unvierse (apart form other bigger bh). So I think you can get out of a bh's non-return horizon by having another bigger force than the one that the bh's gravity has on you. This force would need to me gigantic. |
But the gravity of a black hole depends on its size, or rather its mass, and this will vary among black holes. I wonder if you could find a Lagrangian Point in a double black hole system--a smaller black hole orbiting around a larger for instance--where an observer could be positioned slightly above the EH of the smaller black hole.
Now when I stick my hand into the Event Horizon, I should not be able to pull it back out regardless of the size of the force helping me to pull back since nothing can escape a black hole. There is the exception that there could be some quantum tunneling taking place at the surface. BTW, is this quantum tunneling what is meant by evaporation of a black hole. I have read that black holes will eventually evaporate and disappear over trillions of years.
Another thought, could I go into orbit just above the Event Horizon? I'd have to be moving incredibly fast, yet I would be in free fall, so no forces would be ripping my body apart or anything, right? Hmmm. Then what happens if I try to scoop up some of that blackness. Maybe loose a hand? Need to take into account who is observing, reference frames, and effects of time and space distortions since I would be moving very fast while inside a huge warp in a the spacetime fabric.