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IFLScience

IFLScience

It’s very confusing to think that this visible universe is not 13.7 billion light-years across

IFLScience
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One light-year is the distance that light covers in one calendar year.

That’s over 9 trillion kilometers or almost 6 trillion miles .

We can’t really see the Big Bang because the universe was so hot and dense that light was not free to move.

The most distant point we can see is around 46.5 billion light-years away.