Crossing Event Horizon of Black Hole: What Happens?

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Discussion Overview

The discussion revolves around the theoretical implications of crossing the event horizon of a black hole, particularly regarding the possibility of exiting the black hole while it is in motion and the effects of time dilation on objects within the event horizon. The scope includes speculative reasoning and conceptual exploration of black hole behavior.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification
  • Speculative

Main Points Raised

  • One participant questions the possibility of exiting a black hole after crossing the event horizon, suggesting that space collapses to a point and movement is limited to time.
  • Another participant asserts that once something crosses the event horizon, it cannot escape, emphasizing that the interior remains speculative due to the inability to interact with it.
  • A different participant challenges the notion of speculation, arguing that observed phenomena consistent with black hole behavior warrant inquiry into time dilation effects on objects within the event horizon, even if such discussions are speculative.
  • There is a contention regarding the term "interact," with one participant suggesting that while information cannot be sent out from inside the event horizon, telemetry can be received until the point of crossing.
  • Participants express differing views on the value of speculation, with some showing interest in exploring hypothetical scenarios while others prefer to avoid speculative discussions.

Areas of Agreement / Disagreement

Participants do not reach consensus on the nature of speculation regarding black holes. While some emphasize the limitations of current knowledge and the speculative nature of the discussion, others advocate for the exploration of theoretical questions despite these limitations.

Contextual Notes

Limitations include the lack of direct evidence regarding the interior of black holes and the speculative nature of discussions about their behavior and properties.

Ironlenny
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You cross the event horizon of a black hole and send that black hole traveling towards a star. When the black hole is in orbit around the star, you (assuming that you can) exit the black hole at the same time as when you entered it. What happens? Is that possible?

From what I understand about black holes, when you have crossed over the event horizon, the dimensions of space collapse to a point, and the only direction that you can move in is time. I asked my self the above questions and I don't know what to make of it.
 
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Hi Ironlenny,
Once something has crossed the event horizon, it can never get out of the black hole. What is happening on the inside is a matter for speculation, since we haven't found any black holes, and even if we did we couldn't interact with the interior.

This is a short answer, but you can use the search menu ( top toolbar) to find other discussions about black holes in this forum.

M
 
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I was under the impression that we have observed phenomenon that behave as we'd expect a black hole to behave. Since they behave like black holes, I believe it's reasonable to assume that they are black holes.

I am curious about your comment on speculation. It seems to imply that a question that can't be answered with our current level of knowledge shouldn't be asked. I want to know how time dilation would effect an object inside the event horizon of a black hole that was accelerated to a fraction of the speed of light. I don't care that it is speculation. I am asking the question for the sake of asking it.

I would also like to point out that you can interact with the interior of a black hole, but you can't send out any information. If you orbit a black hole above the event horizon and send a probe, it will send telemetry right up to the point that it crosses over.
 
Ironlenny said:
I was under the impression that we have observed phenomena that behave as we'd expect a black hole to behave. Since they behave like black holes, I believe it's reasonable to assume that they are black holes.
Fair enough, but it's not direct evidence.

I am curious about your comment on speculation. It seems to imply that a question that can't be answered with our current level of knowledge shouldn't be asked. I want to know how time dilation would effect an object inside the event horizon of a black hole that was accelerated to a fraction of the speed of light. I don't care that it is speculation. I am asking the question for the sake of asking it.
Why so defensive ? I wasn't criticising your question. I just don't want to take part in speculation.

I would also like to point out that you can interact with the interior of a black hole, but you can't send out any information.
If you can't receive any data from the region, you're not interacting. Maybe 'interacting' is a bad choice of word.

If you orbit a black hole above the event horizon and send a probe, it will send telemetry right up to the point that it crosses over.
(my emphasis).
Which supports my point that we can't know directly what's across the horizon.
 
Mentz114 said:
Why so defensive ? I wasn't criticising your question. I just don't want to take part in speculation.

I realize that you are trying to help, but I am interested in speculation.
 
I realize that you are trying to help, but I am interested in speculation.
I'm sure someone will speculate with you in time. Try searching other threads in the meantime.
 

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