All Questions
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Time and causality at the beginning of the universe
I have been, quite a few times, been caught up in arguments on the internet, where my opponent posits causal events existed before the "singularity" at the "beginning" of the ...
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0
votes
1
answer
121
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Distinction between different points at Big Bang Singularity
As per the Big Bang model of Cosmology roughly 13.8 billion years ago a singularity exploded exponentially to eventually become the present universe.
At the present time (basically current time-slice) ...
- 648
2
votes
1
answer
621
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Why do singularities either lie completely in the future or completely in the past?
In his book "A Brief History of Time", Prof. Hawking goes on to state that singularities either lie completely in the future or in the past.
What does that mean in layman terms and why does it so ...
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1
vote
1
answer
221
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Space-time infinite [duplicate]
My apologies if this is a duplicate question. I could not find it. Why do we think space-time itself started at the BB? Or to word it another way, could space-time have always existed infinitely in ...
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2
votes
2
answers
483
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"Before" the Big Bang was the Universe really compressed into a mathematical point? [duplicate]
A couple of weeks ago a teacher of mine (I'm taking mathematics) was giving a final inspiring lecture about how fundamental Math is to every possible universe. During the lecture though, he said that ...
- 131
3
votes
3
answers
7k
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What happened during the Planck Era of the Big Bang?
If you look at a big bang timeline before 10 to the -43 seconds you can see
Planck time - ????
So I googled it and was met with
Before 1 Planck Time
Before a time classified as a Planck ...
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-1
votes
1
answer
122
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Singularity - Origin Point
How can it be said that the real beginning of the real universe involved a "singularity of zero size and infinite density of mass" when no space existed at all to define any density and when nothing/...
1
vote
2
answers
652
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Can a sufficiently large black hole be singularity-free?
This came to me after reading that a black-hole that has the mass of the observable universe will also have an event horizon that covers the observable universe.
Since the definition of a black hole ...
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1
vote
1
answer
560
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How can the Big Bang singularity exist in spacetime if it has zero volume? [closed]
How can the Big Bang singularity exist if it has zero volume? I tried googling to find the answer - no help.
Can someone give a general idea how can the big bang singularity exist even if it has zero ...
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2
votes
1
answer
356
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The universe appears to have a lower bound in the time dimension, why not an upper bound?
The Big Bang looks like a lower bound to the "size" of the universe in the time dimension. Could it also have an upper bound, some furthest point in time from the Big Bang?
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