Is there like a wall that says end of the universe or what?
Or is it like we use to think of the earth, and its round? How could it be round though? Its not like were on the outside of it like earth.We cant just go in a circle and end up in the same spot. SOmeone explain?
well if you are talking about "known" universe or our universe.. well yeah.. it's like a bubble that is expanding since the big bang.. the thing is there maybe multiverse like multiple bubbles.. now that is infinite.. nobody knows how many universe there are..
so the observable universe has a radius of 13.7 - 13.8 billion light years.
if we were able to observe something 13.9 billion light years away it would be traveling away from us faster then the speed of light there for 13.8 billion light years is the physical limit on the size of our universe relative to earth, perhaps.
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