this post was submitted on 23 Apr 2025
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Is it tho? Assuming there was a big bang, isnt it fair to call that origin point 0 0 0 in 3D space? Subjective space is relative, but that doesnt mean space itself is relative.
that's not how the big bang works, the whole thing about the big bang is that it was a singularity containing all of space in a single point.
The standard analog is to take a small balloon with dots painted on it, then inflating it. The surface of the balloon is spacetime, and as it shows there is no origin, everything just gets more distant from everything else.
Doesn't the balloon have a centre of mass that we can adjust coordinates to.... all the time.... at millions of km per second.
Okay, I see your point.
They are only talking about the surface of the balloon. For the purpose of the metaphor only the surface exists. Imagine infinite space. Now imagine we divide infinite space into a grid of 1 meter cubes. Now imagine we double the size of every cube. That's more or less how expansion works, it is an expansion of space everywhere, not outwards like an explosion.
I've been struggling to not see it as explosion/outward expansion. This really helped!
the big bang wasn't an explosion from a point, it was an explosion of a point in space. That one point is still expanding to this day. Everything is moving away from everything else, which wouldn't be the case in an "ordinary" explosion. We are all still in that one point, it's just that that point has expanded. The center of the universe is, in the literal sense of the word "literally", everywhere.
I am the center of the universe. Got it.
Wait until you hear about quantum immortality...
Being the center of the universe, I already assumed I was immortal.
Objectively based solipsism
Like one of those pills you put in water and it turns into a sponge TRex!
Based and T-Rexpilled.
Im kinda trollin at this point, but in an ordinary explosion, in a vacuum without external gravity, everything would indeed have a different initial velocity and direction, so everything would be moving away from everything else.
imagine standing at the side of the explosion looking towards it. some debris will be blown way from you, but some will be coming towards you. You are something, and not everything is moving away from you, some debris hits you in the face. That's an explosion in space.
An explosion of space is defferent. Everything will be moving away from you, regardless of where you are or which side you're facing.
Something wasn't in space and it exploded. Space itself exploded. your argument only holds if you are exactly in the explosion source.
In space, we're still inside the explosion
So from wherever you look, the universe is expanding away from you (I.e., other things in it move away from you).
Therefore, you can see that the universe doesn't have a centre. From this and some other a bit more complicated things, one can see that the Big Bang never had a single point but rather expanded everywhere at once when it happend. Although often called expansion from one point that is wrong.
Also technically you would need to give a time dimension as we live in 4D space.
Wouldn't that be the case even with a center?
Yes indeed, you could see every point as the universe as its centre (or none of them).
When everything is center, nothing is.
No. The only logical explanation is that I am the center of the universe!
the 0 0 0 0 (spacetime) orientation system would be possible if the universe was a minkowski space and thus flat, but spacetime is curvy due to relativistic effects, which prevents any sort of flat orientation like that
I'm so glad you asked that.
Never had that many comments in my inbox
Think of a balloon expanding. All the dots on the surface are moving away from one another. No dot is the centre.
If they are all moving away from each other, that means if you reverse time they will all converge at a single point, which would be the center.
Every point is that point. Every point would see the whole universe converge on them simultaneously.
I'm just going to jump on the bandwagon and helpfully say; think of the universe as a large expanding paper bag.
Initially it was flat, but then the bagger expanded it in the third dimension and put bananas in it. Imagine now that you are one of those bananas, but oh no, here comes the 2L Pepsi bottle ready to crush us. Thankfully the bagger takes us out of the bag first, puts the cola bottle in, and then puts us back in on top.
And that's why I believe in God
Uh what?
Think of an expanding balloon as the universe, and the paperbag as the expanding multiverse. Now assuming a uniform conservative rate of 1.5 marvel movies a year, how much does the paper bag fill with vomit before the balloon bursts?
27 ducks?
The big bang created the universe within space. Space is literally, just space, an endless empty (as far as we know) vacuum.
No the big bang also created space time. The bang is the bang of space going from a point to infinite 3d space + time.
Yeah, I believe it was Einstein who showed that space and time are linked together and cannot be separated, although I won't claim to understand that concept.