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A black hole is a region of spacetime from which nothing can escape. More formally, the future light cone of any observer within the black hole is completely contained in the black hole, and the black hole region is not within the past light cone of any observer that goes to spatial infinity in an infinite amount of time.

1 vote
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Is it possible to say we are inside a black hole? [closed]

Why I am asking is because I read about it on the internet. But if that is true, does it imply the following? If one is inside a black hole than he could be seen as trapped in a space-time observatio …
J.Gili's user avatar
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1 vote
2 answers
1k views

Are White Holes the inside of Black Holes?

I read about a theory that says that The Big Bang could be actually considered a White Hole. Than I started thinking. White Hole: an unreachable region from which stuff can come out. Black Hole: a re …
J.Gili's user avatar
  • 63