Slashdot Mirror
Study: Our 3D Universe Could Have Originated From a 4D Black Hole
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."
Turtles all the way down.
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.
I should use this sig to advertise my book ISBN-13 : 978-1501515132.
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?
Someone flopped a steamer in the gene pool.
What's their point? There's not a singular thing I can see there.
For all intensive purposes, "whom" is no longer a word. That begs the question, "who cares"?
"I just had an awesome idea. 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."
".. we happen to live in the causal future of the classical big bang singularity .. we outline a novel mechanism through which any thermal atmosphere for the brane, with comoving temperature of 20% of the 5D Planck mass can induce scale-invariant primordial curvature perturbations on the brane, circumventing the need for a separate process (such as cosmic inflation) to explain current cosmological observations ..."
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?
... hurts my brane.
No Inflation Taxation without Representation