Universe Infinity Debate

The cluster revolves around debates on whether the universe is finite or infinite, distinguishing the observable finite portion from the potentially infinite whole, and exploring implications like infinite matter, gravity, and expansion.

📉 Falling 0.3x Science
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Keywords

youtube.com ycombinator.com wikipedia.org i.e universe infinite finite observable heat death infinity space homogeneous black hole

Sample Comments

sorenbs • Oct 23, 2011 • View on HN

Not if the universe is infinite i suppose?

randerson • May 10, 2021 • View on HN

Isn't the universe potentially infinite?

Triv888 • Dec 22, 2020 • View on HN

An infinite Universe makes the most sense, let's adopt that

sillysaurus3 • Jul 4, 2017 • View on HN

That's likely our observable portion of the infinite universe. It doesn't mean the universe is finite.

thatcat • Oct 25, 2025 • View on HN

Wouldn't that be infinite universe theory?

colanderman • Oct 14, 2018 • View on HN

Why would an infinite universe necessarily contain infinite matter?

drpixie • Apr 14, 2024 • View on HN

Sounds like the start of a proof by contradiction that the universe is not infinite, merely very, very, very large :)

vivzkestrel • Apr 19, 2024 • View on HN

How would you determine if the Universe is finite or infinite?

voidUpdate • Apr 22, 2025 • View on HN

It's only been a finite time since the universe was very small, so unless it's expanding infinitely fast, I don't see how it could be infinite

wlievens • Dec 10, 2007 • View on HN

The universe isn't infinite. If that'd be the case, there'd be infinite matter, and therefore infinite gravity, and we'd all be reduced to black hole singularities :-)