Message from @TastefulH8r
Discord ID: 444893485146046476
So is in inhomogeneous and also not isotropic?
Expansion means that the space between the points has become greater. Not that more “points” have been created. That’s one of the big confusing points in GR
Our universe is homogenous and isotropic
Oh I misread what you said my bad.
Meaning the average energy density is the same roughly everywhere, and the universe looks the same from wherever you are in it
So it would just keep expanding and never retract to the point where there is another big bang
I mean, I was taught, albeit in high school, that galaxies could be moving away from the Earth.
And that would just kind of never end?
Yes but it’s worth noting that most people don’t believe in the cyclical universe. And yes there are galaxies that move away from us due to expansion, and then there are some closer ones that move towards us regardless of expansion
The further away something is, the more the expansion has an effect. That’s why we have an “observable universe”. Beyond that point the space between us and objects there expands faster than light so we could never interact
I'm still not understanding how expansion of the universe can be at all possible when its infinite.
So what does that say about the state of the universe before the big bang?
Sure so for one we don’t know if it’s infinite. But if it were, the way it would expand is by the space between points expanding.
What could have caused the big bang if it's not possible that things retracted to that state
contracted*
We don’t really deal with that in physics. A philosophers opinion on what happened “before” the Big Bang is just as valid as a physicists
To me it doesn't sound very plausible that time existed infinitely before that
god damn this server gay nowadays
Yeah the argument goes “how could infinite time have passed for us to be here” but we pass through infinities every day if we assume space is continuous
poster below is gay
^^^^poster above is gay
Not matter but space and time
joe fuck off and fire up your charcoal grill
The boomer is mad continue on
Because if it is you walked from point a to b and covered an infinite amount of points in space. So that same argument can be applied to the time thing.
I'm not understanding that
So matter isn't infinitely divisible like time and space is?
u mad bro ???
No matter isnt
No, are you?
So what's the smallest unit in matter?
u maaaaaaad bro ? @IAmHiding
Subatomic particles
Wouldnt it be whatever makes up quarks
Depends on the thing you’re talking about. Idk particle physics really at all but it’s quarks and I think electrons are fundamental particles too. Idk that field at all though
Yeah and then other theories have other ideas about what it could be like the string people
but all you know is there is a fundamental unit there that cannot itself be divided
Ur dink
what is going on here