Are we living in a baby universe that looks like a black hole to outsiders?
Are we living in a baby universe that looks like a black hole to outsiders?
Our Universe appears to be expanding and cooling, having originated some 13.8 billion years ago in a hot Big Bang. However, it's plausible that what we see from inside our Universe is simply the result of being inside a black hole that formed from some parent Universe. If the black holes that form in our cosmos give birth to baby Universes, perhaps we arose from the formation of a black hole ourselves.
Anton Petrov just put out a video with a similar topic: https://youtu.be/l4C6Ll6sIQU?si=ac9K5RKYrbFmyapj
He is an awesome science youtuber and does a great job of explaining research on these kinds of topics.
I haven't watched it yet but will soon. (It popped up on my feed today and remembered it, just for you!)
I really like his content, but his way of speaking (can't even say what exactly) is somehow perfect for my brain to completely tune out. I have to really focus on it to actually mentally process it.
Yeah, I use his channel to fall asleep sometimes. No shade.
Agreed. He's very monotone and I don't think his mic is very good. I like the content, not trying to tear someone down but he's not a small channel anymore. Wish the production value was a bit higher to engage us more. I want to watch every video but I only watch the ones that I really want to know more about, for this reason.
I used to think this idea was kinda silly and based on flimsy and handwavey justification, but then I saw a colloquium by a famous black hole physicist on it. Now I REALLY think this idea is silly and made up!
how could this be 'plausible', it makes no sense based on how we currently understand black holes.
I've seen this pop up a few times, but there are a couple big issues that pop up right out the gate.
Space is constantly expanding with no center. If we're in a back hole, we and everything else in here are cruising toward the singularity. And if we're in a black hole, we're already passed the event horizon, the point at which gravity is so strong that even light can't escape; and as we progress toward the singularity, that force becomes exponentially stronger... so light from one point inside the black hole would have very limited potential to cross paths with another point... so how is it light from stars is actually making it to us / for the few stars we're actually in the line of fire for it's light - if that's even possible inside the event horizon - shouldn't the night sky only have a narrow region of visible stars; and shouldn't they appear distorted as s all hell?
It seems like you are making the assumption that time and the laws of physics follow the same rules inside the singularity. If we ourselves are inside a singularity, the net result was enough matter to create our known universe... but maybe in the next layer down matter behaves differently and stars can be produced on a smaller scale. Or maybe the matter is heading towards its own scale of big-bang. And what if time contracts to the point that the life of the black hole, and its relative size, corresponds to the life of that universe and its expansion?
A story which comes to mind and presents an interesting theory that could apply here can be found in He Who Shrank.
We'd be somewhere between the event horizon and the singularity - once we've made it to the singularity we'd just be crushed into it to join the infinitely dense speck of matter.
Between the event horizon and singularity we can still exist as a unique object/entity, we just can't move any matter/energy from the inside out.
But once we reach the singularity, we just become more mass in the singularity. No more me, or you, or Earth, etc: just singularity.
The time it takes to move from event horizon to singularity would scale with the size of the black hole, so I guess if the singularity had enough mass to generate an event horizon the size of what we understand to be the universe, then yeah the trillions of years it would take for things like Earth to form, life to develop, etc could all happen as we move closer to the singularity, but we run into the snags like the ones I mentioned in my first post - the observable universe would all be on a crash course toward the same point, and not uniformly moving away from everything as space expands; and the further out we look into space, the more distorted it would become: distant galaxies wouldn't appear as neat discs, but as stretched lines. We could even use that distortion to infer the approximate location of the singularity and gauge how much time is left before we're smashed into it.
No the idea is that we've already been crushed into the singularity and the big bang singularity is what happened to everything after. I believe the idea is that we now exist as a 3-D hologram on the event horizon of 4-D black hole.
One thought that always fascinated me was the idea that maybe our universe does appear to outsiders ..... but it only appears as a sudden momentary flash. We see billions of years, they barely notice a spark.
Yes. I thought that was common knowledge.
Haha theses dudes dont even know that the universe fell into a black hole trillions of years ago.