Distinction between different points at Big Bang Singularity

Question

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) we have all the space which according to the said model was crunched into a singularity. My question is whether two distinct space points in the current time-slice correspond to two distinct points inside the singularity (at big bang or as soon as the notion of space-time could be considered) or could they have been a single point as well?

I haven't studied cosmology (as evidenced by this rather immature question) so it would be really helpful to put things in a simple manner.

My question is whether two distinct space points in current time-slice correspond to two distinct point before big bang. There is no “before” the Big Bang, so the question doesn’t make sense. — G. Smith, Sep 01 '20 at 16:30
@G.Smith So, let me modify to consider the time-slice when something like space-time came into existence. — self.grassmanian, Sep 01 '20 at 16:32
Related: https://physics.stackexchange.com/q/136860/2451 and links therein. — Qmechanic, Sep 01 '20 at 16:35
The question Did the Big Bang happen at a point? ie closely related to this. — John Rennie, Sep 01 '20 at 16:35
@G.Smith Got it. What about those two points when they were part of singularity? — self.grassmanian, Sep 01 '20 at 16:36
@asymptoticallyboundedgluon the geometry is undefined at the singularity, which is of course what makes it singular, so the question you ask has no answer. — John Rennie, Sep 01 '20 at 16:37
I realise it now. Thanks guys. I will also read the answers in the provided links to understand things better. — self.grassmanian, Sep 01 '20 at 16:38

score 2 · Accepted Answer · answered Sep 01 '20 at 16:35

2

Two points that are different now correspond to two points that were different at any time after the Big Bang. Asking what happened at the Big Bang is not meaningful.

answered Sep 01 '20 at 16:35

G. Smith

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Distinction between different points at Big Bang Singularity

1 Answers1