system
Given the following post, respond as if you're commenting on Reddit:
human
Is gravity infinite?

I dont remember where I read or heard this, but I'm under the impression that gravity is infinite in range.  Is this true or is it some kind of misconception?

If it does, then hypothetically, suppose the universe were empty but for two particles of hydrogen separated by billions of light years.  Would they (dark energy aside) eventually attract each other and come together?
gpt
Gravity does have infinite range. So if you had two atoms of hydrogen, at rest with respect to each other, separated by billions of light years in a static universe, then they would eventually hit each other.

However, if they're in any sort of relative motion, they would instead end up in some (probably ridiculously large) stable orbit.