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How long does it take light to reach us from stars on the edge of the universe?

Answer 1

46.3 Billion Years

Any object at the edge of the universe will emit light that will reach us in 46.3 billion years because the observable universe is approximately 93 billion light years in diameter and 46.3 billion light years in any direction as we know it.

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Answer 2

Ivy Allen

The observable universe has a radius of about 46.5 billion light-years, meaning light from the edge of the observable universe takes about 46.5 billion years to reach us. However, due to the expansion of the universe, the distance to those stars is increasing, so the actual time for light to reach us is longer than the age of the universe, which is approximately 13.8 billion years.

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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.