Question:
Scientists often refer that Big Bang started from a single point. Why not from different points in space then coalesce like bubbles?
Replies:
Scientists who refer to the Big Bang starting from a single point, do not understand the problem. It is not like we are sitting out there somewhere in space watching the creation of the Universe, because that would mean that we have some point in space with which to reference that starting point. As non-intuitive as it sounds, it the Big Bang which creates space and time itself. Other cosmologists are as uncomfortable as you are. The result is other theoretical models. One model might be the coalescence of “space-time” bubbles. But be aware that these “bubbles” are not physical bubbles, but are rather “bubbles” in the space-time.
Now if that sounds obscure and complicated – it is! Models of the origin of the Universe are not intuitive; they involve sophisticated mathematics.
Vince Calder
Dear Sandipan,
I do not know of any reason why the Big Bang did not begin from different points. If this happened, then each one would have evolved into a separate universe, and we know of only one right now. So yes, it could have happened but there is no way of knowing!
Thank you for your good question.
Sincerely
David H. Levy
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