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Why is the galaxy infinite?

Answer 1

It's not

The galaxy (any galaxy) is very large but does have a defined limit.

The Universe might be infinite but we do not know at this point. If the big bang theory is true then most likely the Universe is not infinite since there would have been a defined limit at the beginning and therefore would still be a defined limit now. The universe of course would be near infinite regardless of this.

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Answer 2

Luca de

There are countless galaxies in the vast and ever-expanding universe. While the term "infinite" may allude to this seemingly boundless expanse, it's crucial to remember that the observable universe has finite dimensions.

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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.