Study: Our 3D Universe Could Have Originated From a 4D Black Hole 337
New submitter TaleSlinger sends this quote from Nature:
"Afshordi's team realized that if the bulk universe contained its own four-dimensional (4D) stars, some of them could collapse, forming 4D black holes in the same way that massive stars in our Universe do: they explode as supernovae, violently ejecting their outer layers, while their inner layers collapse into a black hole. In our Universe, a black hole is bounded by a spherical surface called an event horizon. Whereas in ordinary three-dimensional space it takes a two-dimensional object (a surface) to create a boundary inside a black hole, in the bulk universe the event horizon of a 4D black hole would be a 3D object — a shape called a hypersphere. When Afshordi's team modeled the death of a 4D star, they found that the ejected material would form a 3D brane surrounding that 3D event horizon, and slowly expand. The authors postulate that the 3D universe we live in might be just such a brane — and that we detect the brane's growth as cosmic expansion. 'Astronomers measured that expansion and extrapolated back that the Universe must have begun with a Big Bang — but that is just a mirage,' says Afshordi."
Sorry (Score:5, Funny)
Re:Sorry (Score:1, Funny)
My brane asplode.
NO! (Score:3, Funny)
His noodliness wishes to inform you that string theory is closer to the truth but the full truth is that the universe is made of strings of spaghetti.
Re:Sorry (Score:3, Funny)
Re:NO! (Score:5, Funny)
Falling into a black hole you are stretched like strands of spaghetti.
The tendrils of a sun's magnetic fields are like great bands of spaghetti as well.
However, this is merely confirmation bias. Clearly, with all the roundness everywhere His meaty balls have the most influence.
Uhhh... what did he just say to us? (Score:5, Funny)
So whatever a 4D star is, when it explodes there is a 3D layer that represents the event horizon. We live in this layer. One side of the layer is a 4D black hole, and the other side of the layer is some other kind of nothingness. Yeah?
Is there someone here I can offer monetary compensation to for them to comprehend this summary for me?
What's their point? (Score:5, Funny)
What's their point? There's not a singular thing I can see there.
Obligatory XKCD (Score:3, Funny)
"I just had an awesome idea. [xkcd.com] Suppose the entire observable universe exists as a 3d brane on the edge of a 4 dimensional black hole."
"Okay. What would that imply?"
"I dunno."
That's easy for you to say .. (Score:3, Funny)
Re:Uhhh... what did he just say to us? (Score:5, Funny)
Damn! Just when 3D printers started getting reasonably priced, now I have to go out and buy a 4D printer? And to print a 4D universe you're telling me I'll need a 5D printer?
Theoretically, would a 4D printer use "strings" instead of "filament"?
Re:Uhhh... what did he just say to us? (Score:5, Funny)
All the way up to 20D, at which point the DM's mother informs him it's time for dinner (corndogs and mac'n'cheese yet again).
Re:The trouble with mathematical models (Score:4, Funny)
This is an illustration of where mathematical models can run amok.
My favourite is:
There are 4 people in a room, then 7 people leave. How many people have to enter the room for it to be empty again?
Trying to visualize this ... (Score:4, Funny)