All Questions
Tagged with space-expansion singularities
22
questions
-4
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46
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Simple question about finite Universe [duplicate]
If, by Big Bang, Universe was created from initial singularity, with finite "speed" of expansion of matter, shouldnt it be finite as well?
3
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0
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61
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Hypothetically, could the interior of a black hole look exactly like the universe that surrounds us?
I do understand that we can't experimentally verify anything we imagine about the interior of a black hole.
If we were to apply what we know about the physics of the observable universe and assume ...
- 33
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1
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98
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Does The Big Bang Require An Infinitesimal Point, Or Is Another Shape Possible? [duplicate]
Einstein's Spacetime has four dimensions. If the size of one of these dimensions is zero, then the four-dimensional 'volume' - or whatever the corollary to 3D volume is called in 4D - would be zero.
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- 103
5
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3
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How can there be a Big Bang without a singularity?
I have read to Sean Carroll that he says that the Big Bang model is correct, but the Big Bang event is incorrect, so what is the difference? And everyone knows that the Big Bang model is linked to ...
- 51
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3
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272
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Black hole cosmology vs. Big Bang cosmology
The evidence for Big Bang cosmology is an expanding universe. The expansion of the universe is accelerating. Gravity causes acceleration. What evidence is there that proves everything is moving away ...
1
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3
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720
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What is meant by "Big Bang" in expressions like "$10^{-36}$ seconds after the Big Bang"?
Sometimes I find expressions like "The inflationary epoch lasted from $10^{−36}$ seconds after the conjectured Big Bang singularity [...]". What is meant by "the Big Bang" in this context?
I ...
- 1,171
1
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1
answer
112
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Did the big bang start at ONE infinitely curved point (or a 4D curved ball shrunk to a point) with an infinite density of energy?
I'm confused. In this question it is said:
The simple answer is that no, the Big Bang did not happen at a point. Instead, it happened everywhere in the universe at the same time.
How could it have ...
0
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2
answers
80
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Mass and Expanding Space
1) space is expanding at an increasing rate, therefore things are getting farther from each other and therefore increasing in velocity.
2) the faster an object moves relative to another, the more ...
- 101
1
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2
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355
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In what sense the scale factor $a(t)\to 0$ lead to the big bang singularity?
How do we understand that the limit $a(t)\to 0$ (where $a(t)$ is the scale factor) lead to a spacetime singularity? Is it by substituting $a(t)$ in the FRW metric and concluding that space makes no ...
- 26.8k
4
votes
1
answer
345
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Isn't the Big Bang contradictory with the existance of singularities in black holes? [duplicate]
So it's my understanding that the current models predict that a super massive object will collapse beyond the event horizon into a singularity of infinite density.
My question is the following: isn't ...
1
vote
1
answer
265
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Big bang singularity in an infinite universe [duplicate]
If the spacetime of the universe is infinite now, then it must have been infinite at every point in its history, right? How then can Big Bang be an expansion of space and time? Can somebody show the ...
- 2,918
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1
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392
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How can an infinite universe be dense at the big bang? [closed]
If the universe is infinite, it always had to be spatially infinite since at the big bang.
And I'm assuming that cosmologists don't think that a Big Bang singularity actually occur in the real ...
- 855
-1
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2
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600
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Big Bang or Big Suck?
Mathematically, is there any difference between a colossal inner force pushing out the singularity and continuing to expansion, and a colossal outside gravity pulling out the singularity and ...
- 31
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0
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74
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Is time unbounded in the future direction? [duplicate]
Time likely had a beginning, because of the big bang theory. But will time ever end?
- 1,252
0
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2
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62
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How Can a Singularity contain different things? [closed]
According to the Big Bang model, space and everything in it was squeezed into a infinitely small point which subsequently expanded.
But if everything is squeezed into a point of zero size than there ...
- 676