Home > Astronomy > Scale of Earth, Sun, Galaxy, and Universe

How big is the universe? Is there a end?

Answer 1

Approximately 90 billion light years.

The difficulty lies in realizing that the interior of our "ball" is the past universe, and that space is created as the universe expands. Imagine that we are sitting on the surface of a ball. Theoretically, if we were to move through the universe in a straight line, we would end up right where we started.

The universe will only come to an end when it stops existing.

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Answer 2

Layla Anderson

The size of the universe is not precisely known. It is constantly expanding, and its extent is beyond current observational limits. Whether it has an end or is infinite is still an open question in cosmology.

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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.