All Questions
7
questions
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Can part of space be causally disconnected from the rest of the universe by being surrounded by black holes? [duplicate]
Is it possible for black hole event horizons to overlap and form a spherical wall around an island of space (that's not inside a black hole) while still being causally disconnected from the rest of ...
- 29
-1
votes
1
answer
44
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What closed 3D space looks and behaves like? (Relativistic Black Hole)
So I wanted to ask a question that is a copy of Why can't you escape a black hole?
From the answers, the conclusion I draw is: it's impossible to escape a black hole.
any trajectory inside the ...
- 111
5
votes
2
answers
656
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What does it mean that the event horizon is a global concept?
In Chapter 6 of Spacetime and Geometry by S. Carroll, he says
‘‘Because the event horizon is a global concept, it might be difficult to actually locate one when you are handed a metric in an ...
- 700
9
votes
2
answers
898
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Is it possible the space-time manifold itself could stop at a black hole's event horizon?
This is a repost of a question I saw here:
Could the spacetime manifold itself end at the event horizon?
which was closed because it apparently didn't seem clear as to what the poster there was ...
- 20.6k
5
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0
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307
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Can a rotating black hole have a donut-shaped event horizon? [closed]
It is conjectured that a rotating black hole has at its center a ring-shaped singularity.
Thus, at the center of the ring-shaped singularity the gravitational field must be zero (similar to ...
- 189
1
vote
1
answer
405
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Is a black hole really a hole in space? [closed]
What if when a supernova occurs, instead of it condensing into a singularity it creates enough force to tear a hole into the fabric of space? Is a black hole just what is sounds like, a hole in space?
-1
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1
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Could the spacetime manifold itself end at the event horizon? [closed]
Could there be cut-outs in the manifold? There have been a number of intriguing ideas over the years hinting at the possibility that a black hole might not have an inside, that it might consist of ...
- 513