this post was submitted on 16 Jan 2025
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[–] g0d0fm15ch13f@lemmy.world 11 points 2 months ago (1 children)
[–] Honse@lemmy.dbzer0.com 9 points 2 months ago (2 children)

Technically any object of sufficient size would colapse under its own immense gravity and form a black hole

[–] loaExMachina@sh.itjust.works 4 points 2 months ago (1 children)

The universe is the biggest object there is and it's not collapsing tho...

[–] Honse@lemmy.dbzer0.com 5 points 2 months ago (3 children)

The universe is not one gigantic solid object

[–] loaExMachina@sh.itjust.works 3 points 2 months ago

Many things we consider objects are mostly not solid, like stars made of Gaz and plasma... And the'res also gaz in the interstellar medium, albeit at very low density. So you still gotta make a hypothesis involving density to determine what will or won't collapse.

[–] HeyThisIsntTheYMCA@lemmy.world 2 points 2 months ago

I mean I'm mostly liquid and I bet so is the dog

[–] rickyrigatoni@lemm.ee 1 points 2 months ago
[–] CrayonRosary@lemmy.world 3 points 2 months ago (1 children)

Isn't the universe a sufficiently large size? Why is it expanding then? What constitutes an "object"?

[–] PoastRotato@lemmy.world 4 points 2 months ago (1 children)

Most of the universe is empty space, and that's what's expanding. Empty space doesn't have any gravitational pull

[–] CrayonRosary@lemmy.world 2 points 2 months ago (1 children)

Solid objects are 99.999999% empty space, too.

[–] PoastRotato@lemmy.world 1 points 2 months ago

Yes, but nuclear forces are strong enough to keep the space within from expanding and hold the objects together. It's in the vast swathes of emptiness between galaxies that we typically see the exansion of space because gravity is too weak there to keep things together.