Timeline for Universe spawned from the death of a hyper black hole?
Current License: CC BY-SA 3.0
18 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 27, 2016 at 7:19 | comment | added | peterh | @kpv If there is, it must be coming from far higher levels as the scientists can reach, which makes it un-physical. :-) | |
| Jul 27, 2016 at 7:06 | answer | added | peterh | timeline score: 1 | |
| Jul 27, 2016 at 6:26 | comment | added | kpv | @peterh: Yeah, I do not want to become a target here, but some extent of mathematical brain washing unfortunately does exist :-) | |
| Jul 27, 2016 at 6:13 | comment | added | peterh | @kpv The bacteria can have experimental evidence from the 3D world, we don't have anything from a >3D world. Until now. As I know, the 10+1D (or the 25+1D) in the string theory is coming from an argument very similar to Occam's razor: it is required to null out the majority of some very complex formula :-) | |
| Jul 27, 2016 at 5:59 | comment | added | kpv | @peterh: I get your point from theory perspective. However from practicality point of view, however small the bacteria is, for the bacteria itself, all its dimensions are comparable in all three Ds. So, the bacteria would know it is not a 2D being. It may appear to bigger being as a 2 D but not to itself. Actually, to a very large 2D or a 3D being, it may seem to be a even a zero D being. Even smallest of the particles are not 2D in reality. | |
| Jul 27, 2016 at 5:57 | comment | added | CuriousOne | Models are meaningless unless one can match them to some data. We don't have data of the earliest universe. The statements we have about that, too, is just another model calculation. | |
| Jul 27, 2016 at 5:38 | comment | added | peterh | @kpv Btw, on the surface of a neutron star, or even on the phase border between the two fluids in your coctail, actually a 2D physics exists with its specific laws. For a bacteria living in your coctail and if it can exist exclusively on the border, there is a 2D universe. | |
| Jul 27, 2016 at 5:30 | comment | added | peterh | @kpv The general relativity is a geometric theory, and works very well. Thus, Occam's razor says, not only everything looks as if the spacetime would be curved, but it is really curved. And, if it is curved, then suspecting an "outer spacetime" is obvious. Now the problem is that the GR uses exclusively intrinsic parameters, which means only parameters which are measurable internally. Thus, it is theoretically impossible to know anything from the "embedding", more-dimensional space which our 3+1D spacetime is embedded in, what makes it un-physical. | |
| Jul 27, 2016 at 5:15 | comment | added | kpv | @peterh: I agree, and I would like to go even a step farther. In a 3D world, there is nothing real that is 2D. All truly 2D stuff has to be imaginary. Think of a sheet of paper is not 2D. Same way, there can not be anything real 3D in a 4D world, unless it is imaginary, or virtual. There are only three spatial dimensions and that is it I suppose. | |
| Jul 27, 2016 at 5:08 | comment | added | anna v | Well, the Big Bang model as it has developed, explains the CMB uniformity with the inflaton field and there is nothing new or necessary offered by these speculations | |
| Jul 27, 2016 at 5:08 | comment | added | peterh | @Secret Ok - ok. | |
| Jul 27, 2016 at 5:07 | comment | added | Secret | @peterh the question is now clear as of the edit 29 mins ago by OP (previously there is no question). And well, most cosmology theories often end up like this , our technology still need quite a bit of time to caught up with them | |
| Jul 27, 2016 at 5:05 | comment | added | peterh | @kpv I suspect a simple gas cloud formed into a 4-sphere wouldn't be enough, because in this case there would be obvious signs of an underlying 4d mechanics. Some mechanism should exist which strongly fixes the particles on the plane, so strongly, that even the LHC and astronomical data could't find anything until now. And this puts the theory into the "interesting theory, no evidence" line. | |
| Jul 27, 2016 at 4:59 | comment | added | kpv | Even if the model is correct, then I would be more interested in knowing how did the 4D universe form, from a 5D universe I guess, with no end to the series. | |
| Jul 27, 2016 at 4:52 | comment | added | peterh | @Secret To me, his question looks clear, but correctly answering it would require around 20 pages even on an enthusiast level. Btw, also I have some never expiring questions. | |
| Jul 27, 2016 at 4:36 | history | edited | Noah | CC BY-SA 3.0 |
added 202 characters in body
|
| Jul 27, 2016 at 4:34 | comment | added | Secret | I am guessing you are talking about this? nature.com/news/… But even then, what is your question? | |
| Jul 27, 2016 at 4:20 | history | asked | Noah | CC BY-SA 3.0 |