Are some shadows darker and colder than others?

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Discussion Overview

The discussion revolves around the existence of white holes and the nature of shadows, particularly whether some shadows can be colder than others. It touches on theoretical concepts and observational evidence related to astrophysics.

Discussion Character

  • Debate/contested
  • Exploratory
  • Technical explanation

Main Points Raised

  • Some participants assert that there is zero observational evidence for the existence of white holes.
  • One participant references a fictional example, suggesting that shadows can be colder, citing a character's experience.
  • There is a claim that direct evidence for black holes is also lacking, with only indirect indicators being present.
  • Participants discuss the definition of "direct evidence" in the context of astronomical phenomena.
  • It is noted that certain theoretical predictions, such as Hawking radiation, have not been detected.

Areas of Agreement / Disagreement

Participants generally disagree on the existence of white holes and the criteria for direct evidence in astrophysics. Multiple competing views remain regarding the nature of shadows and the evidence for black holes.

Contextual Notes

The discussion includes unresolved definitions of direct evidence and the implications of null results in astronomical observations.

deepthishan
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What is the evidence for the existence of a white hole?

Other than theoretical ones, are there any observational proofs?
 
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That shadow on degobah was like really cold just ask luke skywalker so yes some shadows are colder than others
 
Whoa, I think this thread was edited and changed...
Anyways, there is zero evidence of the existence of white holes.
 
Drakkith said:
Whoa, I think this thread was edited and changed...
Anyways, there is zero evidence of the existence of white holes.

Of course, there's zero direct evidence for black holes as well. At most astronomers know that there are gravitational systems whose center must have an enormous mass (enough, according to GR to be a black hole) and that the center has no detectable emissions.
 
I guess that depends on what you consider direct evidence to be.
 
Drakkith said:
I guess that depends on what you consider direct evidence to be.

Well all we have now is a null result, it's NOT a big star at the center of a galaxy. But hallmarks of black holes specifically, things like Hawking radiation and such, have never been detected.
 

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