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Are some shadows darker and colder than others?

  1. Jan 5, 2012 #1
    What is the evidence for the existence of a whitehole?

    Other than theoretical ones, are there any observational proofs?
     
    Last edited: Jan 5, 2012
  2. jcsd
  3. Jan 5, 2012 #2
    That shadow on degobah was like really cold just ask luke skywalker so yes some shadows are colder than others
     
  4. Jan 5, 2012 #3

    Drakkith

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    Whoa, I think this thread was edited and changed...
    Anyways, there is zero evidence of the existance of white holes.
     
  5. Jan 5, 2012 #4
    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.
     
  6. Jan 6, 2012 #5

    Drakkith

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    I guess that depends on what you consider direct evidence to be.
     
  7. Jan 6, 2012 #6
    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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