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Results tagged with black-holes
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user 178912
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.
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How much time would it take for a black hole size of a proton to suck up a pen? [duplicate]
Suppose a black hole size of a proton appeared.Would it take it a lot of time to suck up a pen and eventually earth? What formulae should i use to calculate that?
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