Bigbang and the begginnig of time

[adjacent]

What could have been happened in the bigbang.If there were an observer what would s/he see.
And were there absolutely Nothing before big bang,Does that make any sense?

 

[Chronos]

The big bang model does not attempt to address the origin of the universe. It's only applies to the post inflationary universe.

 

[phinds]

The big bang theory does not make any statement about the singularity or if anything came before. It is a theory of how the universe evolved starting at about one Plank time after the singularity.

 

[adjacent]

But bigbang theory claims that the universe started from a point.Am I right?

 

[phinds]

But bigbang theory claims that the universe started from a point.Am I right?

Most emphatically NOT. The universe in the big bang theory is a hot dense plasma of unknown size and shape but DEFINITELY not a point. It might have been infinite in extent.

 

[skydivephil]

There are many different ideas cosmologists are pursuing about what might have happened at the big bang, none of them are experimentally confirmed. The debate is ongoing. Google these terms for some of these ideas: (there are probably many more)
loop quantum cosmology
eternal inflation
ekpyrotic universe
conformal cyclic cosmology
string gas cosmology
matter bounce
Gott-Li
Caroll/Chen
Braum Framptn
Cosmic natural Selection