Scientists trying to explain the universe's accelerating expansion usually point to dark energy, which seems to be pushing everything apart.
But an Indiana University professor has a new theory, reports New Scientist: We're inside a black hole that exists in another universe. Specifically, a black hole that rebounded, somewhat like a spring.
Some fairly mind-blowing physics is involved here, but the gist is that Nikodem Poplawski of IU-Bloomington used a modified version of Einstein's general relativity equation set that takes particle spin into account.
Including this variable makes it possible to calculate torsion, part of the geometry of space-time. It also gets rid of the black hole singularity, a phenomenon that general relativity cannot explain.
In a study published earlier this year, Poplawski said when the density of matter reaches epic proportions, torsion counters gravity. This prevents matter from compressing indefinitely to a singularity of infinite density. Instead, matter rebounds like a spring, and starts expanding again.
In Poplawski's latest study, his calculations show that space-time inside the black hole expands to about 1.4 times its smallest size in as little as 10-46 seconds -- two orders of magnitude faster, for lack of a better word, than the Planck time. This brisk bounce-back could have been what led to the expanding universe that we see today.
But here's the real kicker: as Poplawski says, we may not be living in our universe at all; we might be living inside a rebounded black hole that exists in a different universe.
We could tell by measuring the preferred direction of our universe. A spinning black hole would have imparted some spin to the space-time inside it, which would violate a law of symmetry that links space and time. This might explain why neutrinos oscillate between their antimatter and regular-matter states.
Reminds me of The Farnsworth Parabox.
So we are in a black hole and our galaxy has a black hole...what if there is the same thing happening in our galaxies black hole and so on and so in to infinity O_o
I knew it!!
I hope there is still some real-estate available outside our black hole, because nothing is worse then being a day late to the public auction.
I like this idea, looks cool when you visualize it in your head.
Sounds more like early-stage proof of concept math than an actual, practical prediction. Then again, I'm one of those scrubs who doesn't like the metastable non-singularity. You can't just have a near-infinite-density mass ALMOST falling in on itself for (almost) ever, that's just wrong.
But hey, maybe black holes hate thermodynamics too.
That about sums it up. Infinity is what space is. Infinite both ways though so this theory doesn't hold up.....
Lets play 'create a theory....'
One is as good as another....
I take the xkcd approach to this:
"The universe is actually inside of a black hole in another universe."
"Ok. What does that imply"
Space can be "infinite" without being an infinite plane. It's still pretty possible for spacetime to be limited in its overall shape (like a torus/doughnut), which would allow for this sort of "contained" universe. At some level, it is very likely that there is an infinite plane of higher-dimensional space in which the multiverse at large sits, but even THAT doesn't have to be "infinite" infinite. It, too, could be that handy-dandy folded-in-on-itself shape that allows for infinite freedom of movement, but not infinite dimension.
So really, the nature of spacetime itself doesn't necessarily rule out this kind of theory, it's more just the math behind it. If it's solid, it's possible, and if it's possible, that means that, in the grand scheme of things, it HAS to happen somewhere, it just might not be happening here.
If our big bang were a rebound of a black hole into our current dimension, wouldn't that mean that we were "bubbled" out of a much larger universe?
And further, wouldn't that imply that additional matter could enter our universe if/when the black hole consumes more matter?
If that were the case, would there be any signature of that type of event to look for in the cosmos?
Many questions, no answers--yet.
Precisely. This box contains our own universe.
This sort of thing has been suggested before. The important differences this time seem to be that this (could) naturally explain the arrow of time -a first- and do away with the "Inflaton" to explain Cosmic Inflation -also interesting.
Actually, could this 'Torsion' force have anything to do with angular momentum? I've always wondered if that props-up a black hole. As anything falling in always has at least some angular momentum to begin with.
Since its then amplified by the greatest pull on the sharpest curve possible -presumably- near the singularity, then shouldn't that potential infinity counter the collapse of the singularity? In fact, as for that 'bounce back' I recall reading that a rotation in/of a 5D space would look like an expansion in/of 4D space.
Now that I think of it, I wonder if this is where M-theory affects our universe. IF an extra (5th) dimension existed well below the size of the nucleus it would only matter under these conditions. Then that sudden increase in strength of gravity might actually be predicted already, if indirectly, by the emergence of this "torsion" effect. It would just be angular momentum under a different light...
For another thing, it strikes me that new "Dark Flow" sounds an awful lot like that universal "preferred direction" mentioned in the text.
That was fun. I'm sure the truth is a lot weirder though.
Good news everyone!
I've discovered that our universe exists in a black hole in our OWN UNIVERSE!
Yo dawg, we herd you like black holes, so we put a black hole in yo black hole so u can reach yo event horizon while u reach yo event horizon
We can only WISH we live in a black hole in another universe because then timetravel is possible!!!!
Why? Check out Godel's theory of rotating spacetime. If spacetime is rotating, then the light cones are shifted and CTC's (Closed Timelike Curves) become possible.
Time travel! Oh please, Oh please --- let it be true. :-)
Good news everyone! I've invented a device that forces you to read this in my voice! Also we may just be able to harness the Closed Timelike Curves to facilitate time travel! Huzzah!
@cholin3947 haha yeah
@farnsworth too funny
dudes! - time to smoke another bone!
If universe is connected to some other dimensions, would it make it heavier, like with magnets, when they're linked together or are we living in a giant magnetic field itself?
It's interesting, because we could be only one pole, looking like monopole to us, because spin would flip, traveling trough gravity center, compress and expand EM spectrum in process.
Our magnets are not dots but compacted set of particles, spinning in the same way, depending of their origin. Nobody ever saw how basic magnetic field looks like. If we purpose that a basic particle exist like alpha quark or something, all particles today are winded up and we can't see basic one anymore, since they're all compressed in some matter. Also, if we're talking about the shape of the space, we must take into account everything that exists and has already happened, so if universe as a whole has some properties, they should be formed from some static shape and changed with motion.
Problem is, pieces are separated, so how can the same ones still feel the same movement as in beginning? Universe is spreading, so things should become lighter and faster, due to R2 rule. Perhaps because all those pieces are still connected, spreading apart before our eyes in groups, forming in local gravity fields. Not every particle by itself, patches of them are moving together.
Some parts of us are pieces of one place and others are parts of something else, coupled trough time in a body. Now I'll say something stupid. Is it possible, matter is grown inside an universe, trough coupling of entangled particles?
This sounds just fashionable enough to suck up a big pile of cash, and maybe stick around long enough to generate a few PhD's that will be obsolete two years later when the new improved REAL reality is determined. On THAT day, you pitiful insects will bow to the strange and arcane will of the everlasting, all powerful Loc Nar. After this galaxy bows to the Loc Nar, you will all be turned necrotic and gooey, so you can be slurped up by the newly risen undead zombies. I will be long gone two songs before that time, as I already paid off Hanover Fist.
This headline sounds like a question a 5 year old would ask. The answer is, no, we are not living in a black hole. I can tell, because I can see light.
It is quite possible. However, improbable simply due to the gravitational forces involved with black holes; and yet the universe is expanding.
Uh, no, it doesn't work like that.
@bdhoro87 duh black holes sucks everything in naturally , and what it sucks must come out creating another universe
OMG i love Farnsworth! lmao
Best. Comments. Ever.
Wouldn't this violate a lot of fundamental principles such as conservation of mass and the laws of thermodynamics? As someone else pointed out, this theory would suggest an infinite number of "universes" - if our universe was inside a black hole and we have black holes in our universe, and those black holes have other universes inside them. It's like recursion run amok.
I'm not a physicist, but I was thinking about this the same day this article was posted:
Isn't it plausible that a Universe is created from those supernova explosions which spawn black holes? Isn't that enough energy, isn't that the "Biggest" Bang you could naturally get & isn't that enough raw material to build with?
That would mean that Black Holes are the birthmarks of Universes and Exploding Stars are their parent.
I want someone who is not illiterate in the language of the Universe to find a way to test that hypothesis and expand on it.
if we are in a black hole maybe the entire universe is a black hole and everything we look at through our telescopes is space-'time'. Maybe everything we see is ourselves at different stages in time over all of existence! Like a "donut universe" we see around the edge to see ourselves millions (or more of course) of lightyears in the future (or possibly the past?). Maybe things with a blue shift are things (ourselves/our universe) in our past, and the red shift may be things (ourselves/our universe) in our future.... comtemplate that!
How is that for a crazy theory!!!
Or maybe we should be like Einstein and think as simply as possible while being smart enough to determine how 'simply complex' the universe really is...