Ponder this boys and girls. Just suppose God made this very universe or cosmos as we can now it, in the same Light that He made the part of the Creation that He dwells in, to this very day! Fore God does dwell in a place where He, and it is unseen to us. We are told of a Red Dragon who is an Adversary of God. This Red Dragon who was named Satan after his fall, was created a Covenant Cherub with the creation of God he was put over as it's covering. Thus the term, ...thou art the anointed cherub that covereth...(and God as Covenant Maker)..for I have set thee so... When he fell, the creation he was over fell with him. How did it fall? Some kind of explosion or big bang; and it formed a time space matter place that we can know of. This is why God could not destroy Satan because he was a covenant creature, if God destroys him He has to destroy the whole of His creation including where He now dwells! God's part of the creation did not fall but became unclean because this covenant creature could go anywhere in it that he choose.
Now without writing a book about this or trying to explain every little thing, what scientist are saying is they through several different theories, can measure back to a certain place where the creation began and no further and there was some kind of big bang. They will never be able to measure any further because God is immeasurable. They've actually made a case for God, His Creation; for Satan and his fall and the fall of the creation. That's not bad for insisting there is no God!
Some of my point is, all of the things that we can know of as, or in creation as we see it in this fallen dark light; had it's beginning in the time before this fall. What the big bang actually is, I don't know other than what I said. But Satan and his angels were made in the same manner as God and His Holy Angels and they must have dwelt in the same kind of place where God resides to this day. Paul writes in Romans 8 that the creation fell into corruption but of no fault of it's own. Is the big bang an explosion or implosion, or a plosion that we don't understand; about God's creation and it's fall. There are some things God is going to keep to Himself and we will never know, is this one of those things?