I mean if I drop a rock into a lake, its makes circles and the outermost circles are the oldest. Or if I blow something up, the furthest debris is the oldest.
In: Physics
It’s hard to wrap your head around and others will explain it better but…in your example the lake existed before the stone was thrown. What makes the big bang so hard to comprehend is that it wasn’t an explosion in space, it was an explosion of space and time. There was no before because there isn’t time without the big bang. There’s no center because there is no space without the big bang. One day, about 13.6 billion years ago, space and time started existing. As far as we know there was already infinite space from the beginning, the bang part is that there’s even more now so things that were close back then have more space between them now.
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