Well, the equations that predict black holes also predict white holes, and the big bang is functionally equivalent to a white hole. And we have found black holes. So…seems like the most plausible explanation for the big bang is…it was a white hole. Still can’t extrapolate backwards for the same reasons, but there are at least implicit causes of white holes suggesting there was spacetime before the big bang.
I think the inability to destroy or create matter counts as Evidence but not necesarily Proof.
It doesn’t as the laws of physics as we currently know them break down at the scale and pressures involved in the very early universe.
Alright but until you can create or destroy energy/matter then you have no evidence to back your claims or dispute mine.
But that doesn’t make your claim provable
I literally said that.
A claim doesn’t need evidence to the contrary to be disputed, so no thats not what you said
I said it wasn’t proof, but that it was evidence. You can dispute a claim that has evidence but if you don’t have any evidence yourself you’re going to look like an idiot who ignores the most likely truth and instead clings to their faith.
To my knowledge, we also have zero evidence that they didn’t exist. Nor have we ever observed matter/energy appearing out of
thin airvaccuum, so it seems unlikely to me.Well, we haven’t directly observed matter appearing spontaneously in a vacuum, but we have evidence to support it does happen
And to my knowledge there can’t be a before time.
Oh yeah? Then where did they film The Land Before Time? Checkmat
I like how there are at least three things that are immediately recognizable as wrong with this question.
Well, everyone has a skill I guess
Can time really exist if there was no frame of reference to measure it? We can only detect it by motion or entropy. It’s the only way of “time”. So if there was some point where there was nothing that moved, then time wouldn’t exist.
For that matter, there’s no way of measuring if time is even consistent. If it were constantly speeding way up, or slowing way down, we’d have no way of knowing.
Time is just a figment of our imagination so we can keep track of movement. Just like magenta isn’t a real color.
Kompromat!
Darn. I fold.
Well, yes and no. Time is a concept derived from a change in state. There is no “real” time. If the universe before the Big Bang existed in a static state, then the concept of time itself becomes meaningless. So in that case, it would be “before time” in a sense
The state cannot have been absolutely static - if it was, the big bang would not have occurred, and the same stasis would be existing now, unchanged.
Duh, spacetime is a casual filter.
Time is an illusion
It’s just a human made concept to create a reference to measure shit
Time is change, and exists whether or not we measure it.
Absolutely not, time doesn’t give a shit about humans, and would happily pass without any conscious observer at all anywhere in the universe.
My layman’s understanding is that virtual particles can and do emerge from vacuum, but in ways that usually cancel out before affecting anything. Occasionally it does affect normal stuff - see the Casimir effect acting on surfaces very close together.
I personally suspect this is an explanation for dark matter and a possible origin of the universe.
If there’s tiny bits of stuff and anti-stuff blinking in and out of existence, anywhere there’s a big fat nothing, both halves should still exhibit gravity before blipping back out. It wouldn’t show up as normal matter because it spends most of its time not existing. The vacuum really is empty… on average. It just hums with enough short-lived quantum shenanigans to have nonzero mass.
And if this follows a steep curve for distribution, then it’s like blackbody radiation. A hot rock will overwhelmingly emit photon wavelengths near the peak, for any given temperature, but in theory any temperature can emit any wavelength. It just happens with vanishing rarity as you get up into the spicy photons. If vacuum will occasionally fart out a particle and antiparticle, then very occasionally it should fart out two particles and antiparticles, together. And with vanishing rarity it can theoretically fart out an arbitrary quantity of mass, alongside a negation that is presumably equal. But if that’s off by a little bit - if it’s allowed to be off by a little bit - then an equally arbitrary quantity of mass will remain. Even if the masses have to match exactly, they could recombine in ways that produce angular momentum and never properly rejoin. And if vacuum produces gravity, well, anything that’s left will accelerate away in all directions.
On cosmic timescales it’s possible that matter just kinda happens. We’d be left with the question of why the fuck that’s how anything works, and where all this quantum vacuum bullshit came from. But creationist cranks would have to retreat back to the first sentence. In the beginning, there was nothing. And it was slightly heavy.
Yeah, I suspect that the universe may expand and contract, so likely all the matter in the big bang came from it all being compressed from the previous cycle.
I also think all total matter gets distributed the same way each cycle, so I guess I think all matter that exists now is the same matter that has existed always.
I also think each cycle, everything happens the same way deterministically, even though it would be exciting to see if maybe events happen differently each cycle.
My crackpot theory is that there’s a universe inside each black hole and we’re currently inside a black hole. All of the matter that a black hole ingests feeds into a big bang on a separate timeline.
The big bang was a singularity where our understanding of time and space breaks down. Well a black hole is the same thing.
Hypothetically if this where true where would the original black hole come fromh
Does there have to be an origin? The universe (at all levels) could be eternal.
Turtles all the way down
Where would the big bang come from?
“Before” the Big Bang is nonsense. It’s equivalent to saying “head north from the North Pole.”
It’s not so much that we know there was nothing before it, but that we can’t figure out what was before it.
No, in our current best-supported model of the universe (Lambda-CDM) the concept of “before” the Big Bang is meaningless. It is the apex of the spacetime “bell” from which everything emerged.
But something must have triggered the big bang. The model might not support this, but this only means the model is insufficient to describe what goes beyond our known universe.
But something must have triggered the big bang.
That’s a separate claim you’d have to prove. We have no evidence of something triggering it, we don’t even know that it would need to be triggered. All of our observations occur inside this universe, therefore we have no idea at all if cause-and-effect even applies to the universe as a whole. The short answer is: we don’t know and have no reason to posit the need for something else.
What does it mean for something to be “beyond” everywhere or before time?
I wish we could see beyond our universe, I want to know so much.
Obviously God did it. /s
That’s a philosophical question, not a scientific one, since it’s by definition beyond the ability of science to answer. It suffers from the infinite regress problem which many people invoke God to solve (the uncaused cause) but that’s not very satisfying, is it?
It is incoherent that sonething could suddenly exist out of nothingness.
Clearly the universe does not exist, this is all an elaborate statistical artifact.
Seems like a distinction without a difference, I sort of assumed the OP meant that is all I mean. We don’t know anything before the beginning after all. Like you said.
That’s nonsense. You think some massive amount of matter just materialized from nothing into a singular point? How do you think all the stuff managed to get there in the first place?
It’s only something we can speculate about. It represents a limit to our ability to gather any evidence that might validate those speculations. We can’t say what happened before it, because time itself was one of the things that popped out of the big bang. What would “before” even mean if time didn’t exist?
Even if time and matter did exist in some sense, we can’t get any evidence for it. We can’t make any kind of useful theory about it. At best, we can make wild guesses.
We could also just say “we don’t know what it was like”. Russell’s Teapot suggests we should instead say there was nothing, because we can’t prove there was anything.
There’s no evidence to point to the big bang as being the very beginning, though. There may well have been a billion big bangs before this one. Each one taking so long to reset and start anew that to us, it might as well be seen as about infinity. Humanity outright doesn’t have the knowledge of what happens on extremely large or extremely small scales. We don’t really have a clue for what actually made space start to expand in the first place, so we don’t know if it’s ever happened before, or even if it happened anywhere else at any other time but outside of our observable universe.
The works of Roger Penrose have shown that it’s conceivable or potentially even provable that at the very largest scales of time and space, there is no meaningful difference between the accelerating “cold” end of our universe and the collossal expansion that began the universe as we know it, and in fact those two states are perpetually cycling, birthing new universes from the explosion of old ones. This is based on the idea that when there is no more physical mass in the universe, you can look at the universe from a reference frame that only looks at the geometry of the energy expanding through space and it’s identical to the beginning states.
I would recommend PBS Spacetime youtube channel for a lot better explanations of conformal cyclic cosmology than my feeble mind can try to relate.
Maybe there were other big bangs, but we need evidence of that, and that evidence doesn’t exist.
Jyst saying “but we don’t know” isn’t a replacement for evidence.
There’s no evidence that time started at the big bang, either. So it’s silly to say.
Not how it works.
“Time exists” is a positive statement. We need evidence for positive statements. There is no evidence of time until the big bang.
Not just matter but time as well. That’s what they were referring to. There is no “before time”.
Regarding your rethorical question: go find an answer and you’re sure to win the Nobel Prize.
Absolutely nothing is a reliable constant except the speed of light.
But the speed of light changes. It can be slowed down. It just doesn’t change while moving through outer space (a vacuum). The maximum speed is the constant.
It wasn’t matter that did the banging, it was space-time itself. Have you heard how we know that the universe is expanding? Well we can extrapolate backwards and find the point in time where space-time was just a point: “the big bang”. Not only was there no space-time for matter to exist in before the big bang, there was no concept of “before” because that word only makes sense in the context of spacetime. So yeah, the person you’re replying to is right, “before the big bang” is a nonsense phrase.
They keep finding inconsistencies to that. Groupings and radiation and gap distances that don’t line up with the expansion expectations.
Then the other more applicable point is that what makes you think “the big bang” was the first big bang? You think mass and entropy and radioactive decay and all this shit in the nothingness of space all started with “the big bang” but it only happens once and then in a ridiculously long time from now when everything reaches absolute 0 and there’s no energy left anywhere, that it’s just done? A one trick pony?
Well what if it all eventually manages to head back to its origin point after that and it makes another big bang that kicks off again?
Then the other more applicable point is that what makes you think “the big bang” was the first big bang?
Well, again you’re using terms of time to describe the birth of time, so no that’s not what I think because that statement doesn’t make sense. But I’m being pedantic, I’m sure you meant “what if our’s wasn’t the only big bang?” And to that I can confidently say “maybe?”. It’s an interesting question but it’s just not a scientific question. According to big bang theory, our universe, space-time and all the matter and energy in it, began with the big bang and we still exist inside it. Other big bangs, if they exist in some higher medium, are simply outside our scope. We just can’t design tests to answer those questions. Best we can tell scientifically is where our universe started.
You think mass and entropy and radioactive decay and all this shit in the nothingness of space all started with “the big bang” but it only happens once and then in a ridiculously long time from now when everything reaches absolute 0 and there’s no energy left anywhere, that it’s just done? A one trick pony?
Again maybe? You’re kinda putting words in my mouth. Idk if our universe is the only one, it’s impossible to know. My original point was that time as defined by general relativity could not exist before the big bang because it was itself a product of the big bang.
What I meant by “what if it wasn’t the first big bang?”, was that what if it wasn’t the first of our own universe? I mean what if space will at some point stop expanding and start contracting. Pull everything back close together again. Then theres another expansion just like what we’re currently in now. The best scientists, physicists, and mathematicians haven’t been able to work out a lot of major thing about our universe or how it works or even if it’s flat or folded in on itself yet. The data and tests/measurements don’t exist yet. So until that can get worked out into a theory, it’s silly to say time began at the expansion.
Last I heard scientists were leaning more toward the ever-accelerating expansion “heat death” theory then the expansion-to-contraction “big crunch” theory, but it’s not set in stone yet. But even if “big crunch” came out on top, assuming that the life of the universe is cyclical is pure conjecture. It could be right, but it’s unprovable, so we’ll never know.
As for the existence of space-time before the big bang, I don’t know what to tell you, I’m just quoting theory. By definition, the big bang is when space-time came to be. If the big bang was the result of an ancestor universe’s big crunch, we can’t assume that the same space-time carried over, let alone that the ancestor universe even had something analogous to space-time. Barring some insanely massive breakthrough, it’s simply unknowable.
Based on the comment you’re replying to, I assume they would say “no, nothing materialized from nothing because there wasn’t a ‘before’ in which nothing could have existed”
What makes anyone think “the big bang” has only happened once?
I’m not a physicist, I don’t know one way or another. But it’s possible that there’s a leading explanation for the formation of the universe based on a mathematical model that predicts exactly one big bang.
Physicists don’t even know why it started expanding to begin with. We also don’t know if there’s anything outside of our own universe. We also don’t know if our universe is curved and folded in on itself, which would make several mathematical calculations for the size of the universe and what was going on with expansion a bit easier to try and work out (I’m also not a physicist. These are just things ive read about) or if it’s flat. Their best measurements right now is that it’s flat. But they still aren’t sure, because they don’t know how big space actually is right now. If it’s big enough, it could still be curved in on itself, but we just can’t measure the flatness of two points far enough apart from each other to notice the curve. An example I given was that it would be like trying to show the earth was round by measuring an area of a sandbox.
How do you think all the stuff managed to get there in the first place?
You’re still thinking like a meat-monkey. There are stranger states out there than one can imagine, and that’s not hyperbole. There was no causality before expansion, because there was no meaningful interactions or spacetime in which interactions can occur.
You’re always going to have a hard time imagining this, because again, you are a human. We all are, none of us can imagine states of the universe without time and space.
very nice analogy. I’m stealing it.
I still think that means I have to up towards Polaris.
I know it’s old, but I still cannot believe it’s the same woman in every panel. Girl looks like a different person in each pic.
The original commercial was showing different women as if to imply it works for anyone. The arrangement of the panels is different from the original ad. It looks like panels 2 and 4 are swapped. I believe there are 2 different women.
If you look at the straps on her outfit,it looks like it’s two people.
It’s not the same woman. It’s an interview style advertisement with 2 women. Here’s the ad - https://youtu.be/1n9sLzlxPf0?si=GFUfdfBUpA5BFazE
That’s what I was thinking. And I just noticed that in 2 of the pics the shoulder strap to her shirt is different. If it’s not different women, it’s at least different shirts in some of the panels
I haven’t seen this meme before but the person in the upper right and middle left look the same. And the rest of the panels look like one other person. Matches with the shoulder strap another person commented on. Probably someone took two different commercials of the same product and stitched them together.
Evidence of god?
ZEROOOOO
Hey, man, we’re all just echoes of light bouncing around and making good vibrations as we bounce pgf of each other. Yeah, man, like, totally trippy when you think about it.
Well you’re forgetting about the big unbang, which occurred just before the big bang and condensed all matter and energy into a tiny speck.
Not a tiny speck. You’re not far off however. Theoretically, before expansion, all matter and energy is contracted into an infinitely dense space. Infinite density of infinite mass and infinite energy occupied infinite space. Or at least that is the start of the big bang.
Your universe is a derivative of another source of matter or energy. You are a derivative and there is nothing you can do about it.
Guess I’ll just try and intergeate the best I can.
Evidence of happiness in life? Zero
One
Dang, nice
Teach me your ways, master
Those cosmologists would be very upset if they could read.
Is this controversial?
The hot big bang is basically just “let there be light” wrapped up in science words and don’t get me started on the period of rapid inflation. It’s incredible to me that the bedrock of modern physics is hand-waved away to get grad students focused back on either bigger nuclear plants and bombs or more qubits.
It’s incredible to me that the bedrock of modern physics is hand-waved away
Nothing is waved away. It’s just a point the math breaks down, just like black holes. That all evidence so far supports the math doesn’t help explaining what exactly is/has been happening there.
Fortunately the big bang isn’t actually a bedrock of anything outside of cosmology and can be entirely ignored by the rest of physics.
Please start on the period of rapid inflation. I’m curious to find out what you think
There are a ton of competing models for how the early universe formed. In order to explain why the universe is so smooth and flat though, they all invoke the idea of a short (10e-37 seconds) period of time immediately following “the singularity” that is presumed to have been literally the first point. During inflation the universe blows up 100000 times in size (and correspondingly drops in temperature by the same factor) then immediately slows down to roughly the rate of expansion we see today.
There are a lot of simulations and theories about this could have worked. And I’m sure they all have lots of grounding and math and believers. But none of thr explanations I’ve ever heard amount to more than “when I do this funny thing, the math works and none of of us know why” and that has been the state of quantum physics for 70 years: a series of “we don’t know but the math works.”
In software, we call that tech debt and I feel like our current model of profit-driven science isn’t capable of actually finding or reporting the answers that underly the debt-riddled results out of modern labs.
I’m glad there’s someone else out there with the same concerns.
I’d be more glad if unknowns and inconsistencies were frankly acknowledged. Even though in some senses Feynman contributed to the metaphorical tech debt, one of the things I love about his lectures is his frankness in regard to the (then) current state of knowledge, and about how much was simply unknown. Much of that is still unknown, and there are major glaring inconsistencies that are handwaved into oblivion.
To be clear, this is not an “anti-science” comment, but rather a desire to see the institution of science become more consistent, and to address unknowns honestly.
Really cool read. Thank you for your answer. Why did this sudden expanse stop so abruptly? It seems a mayor sharp slowdown for no reason?
Yes, I do too
