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How can the universe be infinite and expanding?

Answer 1

The Universe is not considered infinite but finite and unbounded.

The expansion of the Universe can be deduced from the red shift of distant galaxies, as space-time unravels with the passage of time.

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Answer 2

Asher Cohen

The universe may be both infinite and expanding at the same time because the expansion of the universe is defined as the growing separations between galaxies, whereas the idea of infinity implies that the universe is limitless.

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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.