All Questions
Tagged with universe black-holes
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Asymptotic development of the black-hole metric
In the Kruskal-Szekeres extension of the Schwarzschild metric parallel universes appear. In a couple of questions on this site, for instance: Where does the parallel universe in the Penrose diagram ...
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What does it mean for the laws of physics to "break down" at a singularity? [duplicate]
When the statement says:
As you get to the center of a singularity the laws of physics "break down".
What exactly does that mean?
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Are black holes the edge of our universe?
Are black holes the actual edge of the universe? Because spacetime is another dimension, I would assume the universe doesn’t have perceived corners or edges. At least humans cannot perceive it.
The ...
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Could any new structures be formed after the heat death of the universe?
When the universe would reach a maximal state of entropy, heat death would presumably be reached and no structures would be left after the last black hole would evaporate.
However, is this really true?...
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What portion of the universe is black holes?
What portion of the universe is black holes? Is it possible to estimate the percent of all mass that is in the black holes?
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If all the black holes in the Universe were combined into one supermassive black hole, what would its diameter be?
I am curious to know if anyone has ever sat down and calculated what the diameter of a black hole would be, in kilometers, if it were to contain all the mass of all the black holes that are currently ...
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Why didnt early universe collapse into black hole? [duplicate]
Given the early universe was infinitely small, why didnt it immediately collapse into a blackhole before it had time to expand?
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Falling into a supermassive black hole [duplicate]
What could happen to the person to enter and hit the event horizon? Would it be possible to survive and or be taken to a different timeline or universe?
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How was the Big Bang possible if it was so dense even light cannot escape? [duplicate]
Since the big bang comprises of all the particles in the universe in an extremely dense point, couldn't it to be said it would be the most massive black hole to ever exist? Since even light cannot ...
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How hot is a primordial black hole and does it has angular momentum?
I am fascinated by these elusive phenomenon, they are formed in the early stage of the universe where it is not homogeneous and some regions are very dense enough to undergoes gravitational collapse. ...
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Is the escape velocity of black hole greater than the speed of light ? If not, then why does light can't escape the black hole? [duplicate]
I've heard different type pf answers for this qs and not really sure which one to go for.
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Is it possible that a black hole has a universe in itself? [duplicate]
Every black hole has a singularity. But the singularity is covered by a thing called 'Event horizon'or ' Schwarzchild Radius'. Our universe is originated from a naked singularity. By naked singularity,...
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Child Universes
I was watching a program on the future of the Universe and it got into the eventual heat death resulting from Hawking Radiation as the last hurdle till nothingness (assuming the unproven theory of ...
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Mathematical coincidence of the Schwarzschild radius of the Universe?
I read here that a black hole with a mass of the observable universe, $M=8.8\times10^{52}kg$, would have a Schwarzschild radius of $r_s=13.7$ billion lightyears.
I immediately noticed that at the ...
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Can black holes really evaporate? [duplicate]
Stephen hawkings black hole evaporation theory assumes evaporation of black holes by losing mass through virtual particle radiation. As far as i know, the theory isn't based on mathematical ...
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