The observable universe. Does it mean the edge of space where nothing else is? Is it where the universe is currently at in its expansion after the big bang? Or is it just a barrier that our telescopes are yet to look beyond, and there are just more galaxies past it?
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The universe is 13 billion years old so you can only see for 13 billion light years in any direction. Light can only travel up to the speed of light however spacetime does not have the same constraint. We can see very fast galaxies at the edge, we cannot see in front of them
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