Its not so much that "the big bang didn't occur in time and space" as it is, time and space are a result of the big bang. The potential for time and space was in the small dense baby universe or singularity or whatever you wish to call it. So its not a case of "something from nothing", its a case of a realization of a potential that lay within the singularity.
So the universe has existed eternally?
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Picture it like this, let's say you have balloon, squished down to incredibly small dimensions. Before you squished it down, you had marked little "X"s all over the surface in varying places. When the balloon is in this super small, super dense state all points are essentially the same, or so close to being the same measuring the difference would impossible.
Now let's picture blowing up the balloon from this extremely squished state. The points remain the same points but the fabric of balloon expands. The fabric, our representation of space in this case, was there all along. It always had the potential to be much larger and different, but in the extremely small state all points in the fabric were essentially equivalent. The expanded fabric of the balloon did not come from nothing, it was there all along.
I hope this helps, if not let me know and I'll try and think of a better example to explain it.
Now let's picture blowing up the balloon from this extremely squished state. The points remain the same points but the fabric of balloon expands. The fabric, our representation of space in this case, was there all along. It always had the potential to be much larger and different, but in the extremely small state all points in the fabric were essentially equivalent. The expanded fabric of the balloon did not come from nothing, it was there all along.
I hope this helps, if not let me know and I'll try and think of a better example to explain it.
Im trying to get this. So then if there is only the small dense cosmic egg then what was surrounding it before it goes off?
