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Where does the universe end?

Answer 1

Border of the observable universe is about 46 billion light years away.

Sadly, the universe is expanding so quickly that it appears to be almost infinite from our point of view; the furthest distance that can be observed is 46 billion light years.

If the universe is not that old, then how can this be the case?

This indicates that although the light was only 13.8 billion light years away, it took 46 billion light years to reach us because the universe was expanding as it approached.

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Answer 2

Elena Antonova

Although the observable universe is limited by the distance light can travel since the Big Bang, which is estimated to be about 93 billion light-years in diameter, the true extent of the universe is unknown beyond the observable universe. The universe does not have a "end" in the traditional sense.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.