Black Holes are Singularitiesor vice versa?

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Discussion Overview

The discussion centers on the relationship between black holes and singularities, exploring whether they are the same entity or if they represent different concepts within the framework of general relativity and quantum theory. The scope includes theoretical considerations and conceptual clarifications regarding the nature of singularities and black holes.

Discussion Character

  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that black holes and singularities are the same thing, suggesting that the term 'black hole' serves to explain a singularity.
  • Others argue that while the singularity is central to a black hole, black holes and singularities are not identical, as singularities can exist independently of black holes.
  • A participant notes that the singularity is considered the 'heart' of a black hole, with the event horizon marking the boundary beyond which escape is impossible.
  • It is mentioned that singularities can exist in general relativity without being associated with black holes, citing the Big Bang singularity as an example.
  • Some participants highlight the need for a unified understanding between general relativity and quantum theory to fully comprehend the nature of singularities.

Areas of Agreement / Disagreement

Participants express differing views on whether black holes and singularities are the same, with some asserting they are identical and others maintaining they are distinct concepts. The discussion remains unresolved with multiple competing perspectives.

Contextual Notes

There are limitations in the discussion regarding the definitions of black holes and singularities, as well as the implications of general relativity and quantum theory that remain unresolved.

FoxCommander
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Black Holes are Singularities... or vice versa?

Ok so a Singularity is a place in space time where gravity or the things used to determine gravity become infinite. So does this mean that Black Holes are types of Singularities or Black Holes have Singularities in the center, or Black Holes and Singularities are the same thing?
 
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They're the same thing. The term 'black hole' is a way of explaining a singularity.

edit: To clarify that a bit... the singularity is the 'heart' of a black hole. The hole itself begins at the event horizon, which is the radius from the singularity at which the escape speed is equal to light speed. You can't have one without the other.
 
Last edited:


Danger said:
They're the same thing. The term 'black hole' is a way of explaining a singularity.

edit: To clarify that a bit... the singularity is the 'heart' of a black hole. The hole itself begins at the event horizon, which is the radius from the singularity at which the escape speed is equal to light speed. You can't have one without the other.

I disagree. The idea of black holes is fairly well established. However what goes on inside (singularity?) is an open question. General relativity and quantum theory need to work together, but they don't.
 


Black holes and singularities are not the same thing.

You can have singularities in general relativity that are not black holes. The best example is the Big Bang singularity.

Danger said:
To clarify that a bit... the singularity is the 'heart' of a black hole. The hole itself begins at the event horizon, which is the radius from the singularity at which the escape speed is equal to light speed. You can't have one without the other.

You can have event horizons in general relativity without any singularity. For instance, an observer with a constant acceleration has an event horizon.

You can also have singularities without event horizons. The Big Bang singularity isn't hidden behind an event horizon.
 

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