Supervoid/Cold Spot evidence of Hawking radiation?

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Discussion Overview

The discussion revolves around the speculative idea that the universe may reside inside a black hole, particularly in relation to the supervoid and cold spot observed in cosmic background radiation. Participants explore various interpretations of black hole interiors, the implications of Hawking radiation, and the relationship between these concepts and the big bang theory.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that the universe could be inside a supermassive black hole, suggesting that the cold spot might represent the event horizon.
  • Others argue against this idea, asserting that the cold spot aligns with predictions from the big bang theory and does not require speculative hypotheses.
  • A participant suggests that understanding the universe as inside a black hole would necessitate a departure from General Relativity, but notes that this interpretation lacks observable effects.
  • There is a mention of the low temperature of Hawking radiation making it undetectable with current methods, although primordial black holes might produce measurable effects.
  • One participant expresses skepticism about the validity of claims regarding the interior of black holes and emphasizes the need for evidence and mainstream scientific discussion.
  • Another participant highlights the peculiar properties of the supervoid and cold spot, suggesting they warrant further investigation, despite acknowledging the mainstream view that there is no center to the universe.
  • A caution is raised regarding interpretations of tidal gravity within black holes, noting that no such effects have been detected in the universe.

Areas of Agreement / Disagreement

Participants exhibit disagreement regarding the interpretation of the cold spot and its implications for the nature of the universe. While some advocate for the black hole model, others defend the big bang theory as a sufficient explanation. The discussion remains unresolved with multiple competing views present.

Contextual Notes

Limitations include the speculative nature of the claims about the universe being inside a black hole and the lack of observational evidence for tidal effects on cosmological scales. The discussion also reflects varying levels of understanding among participants regarding the implications of black hole physics.

pittsburghjoe
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Could this possibly be what the inside of a black hole looks like? aka our Universe resides in a black hole and this area is the event horizon slowly becoming more desolate as Hawking radiation occurs on the opposite side.
 
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pittsburghjoe said:
Could this possibly be what the inside of a black hole looks like?

No, not at all. While we can't be certain what the inside of a black hole looks like, we can be fairly certain of what it doesn't look like. More importantly, this cold spot fits the predictions of the big bang theory pretty well and there is no need to invoke speculative hypotheses to explain it.
 
I'm saying the big bang was the birth of super duper massive black hole in which we live

reality is stranger than fiction!
 
pittsburghjoe said:
I'm saying the big bang was the birth of super duper massive black hole in which we live

reality is stranger than fiction!
That's not really a good way to understand our universe.

There might be a way of interpreting our universe in such a way that it is true (it would require, for one, that the interior of black holes to be nothing like that described by General Relativity), but it has precisely zero observational effects. It certainly has nothing to do with the void you posted in the OP. Furthermore, Hawking radiation is, for all known sources, far too low in temperature for us to possibly detect at the current time (there is the unlikely possibility of primordial black holes of the right mass producing measurable Hawking radiation, but this has yet to be observed).
 
Could this possibly be what the inside of a black hole looks like?
"we are all inside a black hole" is not an uncommon speculation ... what sort of thing to expect of being inside a black hole would be more like this:
http://www.jimhaldenwang.com/black_hole.htm
... much of that is at A level, however, most people can skip the maths at the start and read the conclusions without getting too confused.
I'm saying the big bang was the birth of super duper massive black hole in which we live...
You can say that - but does that make it true?
https://en.wikipedia.org/wiki/Hitchens's_razor

I am not clear on what @pittsburghjoe means by "inside a black hole" though - within the event horizon of a black hole or something?
Other threads suggest an understanding at pop-science level if that so I don't think we can take this sort of thing for granted.

reality is stranger than fiction!
... I dunno, I read some pretty strange fiction.
The thing about reality is that it can be demonstrated.
The tldr B-level answer is that the supervoid mystery goes nowhere as far as demonstrating that we are currently "inside a black hole".
 
I'm saying it's worth investigating.

Did I, at least, make you smile with super "duper" massive black hole?
 
pittsburghjoe said:
I'm saying it's worth investigating.
what is worth investigating and how did you evaluate this?
Please be specific. This "pronoun game" thing is a waste of time.

Did I, at least, make you smile ...?
Seriously? What would make me smile is if you showed some sign of taking advice on board.

Did you at least check out the links?
If you will not take advice, there is no point anybody trying to help you.
 
Last edited:
It's cute that haldenwang thinks he knows what the inside of a black hole is like.

The supervoid/cold spot is worth investigating because it is out-of-place and exhibits peculiar properties that could end up being the center to the universe.

I know what you are going to say, "there is no center to the universe" ..well, I don't believe that either.

I'm imagining you flipping a table over right now. :mad:
 
You can believe what you'd like, but on this forum we only discuss mainstream science, not personal opinions that go contrary to established theories.

Thread locked.
 
  • #10
Simon Bridge said:
what sort of thing to expect of being inside a black hole would be more like this:

A caution: I'm not sure all of this article is correct, and some of it is certainly prone to misinterpretation. The key point for this discussion, which seems valid to me, is that there is tidal gravity inside a black hole which is not present in our standard models of cosmology; so testing for effects due to such tidal gravity on cosmological scales would be a way of experimentally distinguishing the "universe inside a black hole" model from our standard models of cosmology. (No such tidal effects have been detected in our actual universe on cosmological scales.)
 

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