Can Matter Escape a Black Hole's Gravitational Pull Beyond the Event Horizon?

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Discussion Overview

The discussion centers around the nature of event horizons in black holes and the behavior of matter and light in relation to them. Participants explore whether matter can escape a black hole's gravitational pull if it originates outside the event horizon and the conditions under which this might occur.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant suggests that event horizons are defined by the inability of light to escape a black hole's gravity, questioning how this applies to matter moving at less than the speed of light.
  • Another participant asserts that any object within the event horizon (EH) cannot escape, while those outside may or may not fall in depending on their initial velocity.
  • A later reply reiterates the initial question about a hypothetical moon appearing outside the EH and discusses the importance of its initial velocity and the black hole's strength for determining its fate.
  • It is proposed that matter has inertia, which may influence its behavior compared to photons, and that there is only one event horizon beyond which escape is not possible, except for Hawking radiation.

Areas of Agreement / Disagreement

Participants express differing views on the conditions under which matter can escape a black hole's gravitational influence, indicating that multiple competing perspectives remain without a consensus.

Contextual Notes

The discussion involves assumptions about the behavior of matter and light near black holes, the definitions of escape velocity, and the implications of inertia, which are not fully resolved.

ABHoT
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I am believing that event horizons refer to where light can no longer escape the gravity of a black hole. What about everything else that moves at less than the speed of light?
If a small moon winked into existence at some point further out than the event horizon with momentum that was sending it away from the black hole (if you could believe such a thing), would it get sucked back into the black hole like light? Does matter get sucked in faster than photons of light? Is there a separate 'event horizon'-like distance where matter can either escape or fall back in?
 
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Ah. Just seen the black hole video.
 
ANY object within the EH will be unable to escape from the black hole. Things farther away than the EH may or may not go into the EH depending on initial velocity.
 
ABHoT said:
I am believing that event horizons refer to where light can no longer escape the gravity of a black hole. What about everything else that moves at less than the speed of light?
If a small moon winked into existence at some point further out than the event horizon with momentum that was sending it away from the black hole (if you could believe such a thing), would it get sucked back into the black hole like light? Does matter get sucked in faster than photons of light? Is there a separate 'event horizon'-like distance where matter can either escape or fall back in?

With the moon, it would depend on it's initial velocity, like Matterwave noted, and the strength of the black hole. If the initial velocity is greater than the escape velocity, it's good to go. As for matter and photons, well matter has inertia, so you can naturally make conclusions off of that. There is only one event horizon, & beyond that, as far as we know, there is no hope of getting back out, except Hawking radiation.
 

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