w*********n
发帖数: 126 | | e*****h
发帖数: 50 | 2 1 you assumed there must be 'something' before the bang.
2 it might be bang->contract->bang->contract....
【在 w*********n 的大作中提到】
: God?
| j*********g
发帖数: 1 | 3 nothing was there
【在 w*********n 的大作中提到】
: God?
| d****z
发帖数: 9503 | 4 In standard big bang model, not only matter, but also space-time start at big
bang. Remember, the space-time is intrincically linked to matter in general
relativity.
Well, what is "before" if there is no time?
In some exotic "bang" model, there is a lot of explanations. In bang-bang-bang
-... model, before this bang, it is another bang. And in other model, it is
more complicated. Remember the measurement of time depends on your reference
frame. The people travel into the black hole will realize
【在 w*********n 的大作中提到】
: God?
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