The expanse is infinite and always was....how could it not? See my post above #18 ...Due to useful information given by some of our friends in the above posts, I would like to amend the OP as below.
(The organisers of this forum are requested to amend the OP, if possible.)
How could the first big-bang expand?
There must be some expanse for it to expand. How did this expanse come into existence?