Talk:Ekpyrotic universe

message: Non-standard cosmology has a specific meaning in cosmology, and the ekpyrotic scenario is not considered non-standard by cosmologists I know.
User:Roadrunner
:: "Non-standard cosmology has a specific meaning in cosmology"? isn't that "non-standard cosmology is a cosmological theory that contradicts the standard model of cosmology"?
:: "ekpyrotic scenario is not considered non-standard by cosmologists I know"? umm that link seem, to me @least, to state otherwise ... [quote] "[...] _instead_ of a universe springing forth in a violent instant from an infinitely small point  of infinite density [ed. singularity], the new view _argues_ that our universe was created when two parallel "membranes" collided cataclysmically after evolving slowly in five-dimensional space over an exceedingly long period of time" [see link]. That is or is not contradicting the BB? I guess that is the question ... JDR
:Uh-oh, now you're going to incur the revert wrath of JDR! - Lord Kenneth 04:11, Jan 28, 2004 (UTC)
:Which I don't understand.  There is the plasma cosmology, ekpyrotic cosmology, and Arp's cosmology each of which are completely different from each other.  Most ekpyrotic cosmologies assume that general relativity is more or less correct, and the idea that our universe might be the result of the collision of two higher dimensional branes is "so weird it might be correct" and the idea that we might be able to prove or disprove (using COBE data) makes cosmologists really giddy.  User:Roadrunner
:: plasma cosmology and Arp's cosmology is interrelated [as far as I can tell) ... now the ekpyrotic cosmology is a brane thing (something different) ... ekpyrotic is a neat idea though ... Sincerely, JDR
::: It's possible that Arp is done some previous work on plasma cosmology that I don't know about, but the articles on this website clearly don't have anything to do with plasma cosmology.
::: http://www.haltonarp.com/?Page=Abstracts
::: Arp claims that GR is wrong and comes up with his own model of gravity. If you can find references where Arp supports plasma cosmology, feel free to put him back on the plasma cosmology page.
::: Personally, I think that the case for plasma cosmology is a lot stronger if you ignore Arp.  If you use Arp, then you lose the one big thing that plasma cosmology has going for it (i.e. no weird physics).  User:Roadrunner
:::: "find references"? The Case for Plasma Cosmology
::::  "put him back"? I did ...
:::: "ignore Arp"? arp show one [of the various] problems with the standard model ... 
:::: "no weird physics"? IYO ... If Arp is right, it seems that the "weird physics" is on the BBT side of the equation ... 
:::: Sincerely, JDR
I hope I haven't trodden on any toes with my rewrite (I was going to include something about it in the brane cosmology article when I noticed this already existed); I have to say I'm rather surprised that such an abstruse bit of theoretical astrophysics is so controversial!  I've tried to be even-handed about the theory's status; it would be nice if we could get this to a state where everyone could agree to remove the "disputed article" tag.
One thing to note, though: membrane (specific word for a 2-dimensional brane) is simply not correct as a description of our universe, the more general "brane" is. Bth
:It's probably horrendously bad form to verify one's own version of an article, but I've removed the accuracy dispute header because the article is correct now, and no one's raised a fuss in a week and a half.  What was the original dispute about anyway?  The use of the term "non-standard"?  If that's all it was, my take is that the current version is correct -- brane cosmology is an extension to standard cosmology, not an alternative to it such as plasma cosmology. -- Bth 10:11, 10 Mar 2004 (UTC)
thread_title: Arguing standards

message: "the visible universe lies on a three-dimensional brane".  I thought the visible universe was a four dimensional brane. Inkan1969 19:59, 20 September 2007 (UTC)
thread_title:  3 dimensional brane? 

message: ekpyrotic is a poor article name. An unqualified adjective left floating out of context, its redirect, ekpyrosis, is altogether more fitting to the MoS for what an article title should be. Even "ekpyrotic scenario" or any full name for an article would be preferable to the nondescript and incomplete context of the current name. Nagelfar (talk) 16:43, 16 May 2009 (UTC)
replies: text: I would agree that the bare adjective is a poor article name. I would suggest adding a noun: universe/scenario/model/etc. I think 'ekpyrosis' is probably to obscure & tangential (as it applies to Stoic philosophy, not cosmology), to be appropriate. HrafnTalkStalk(P) 17:01, 16 May 2009 (UTC)
thread_title:  "ekpyrotic" 

message: It's maybe just an illusion, but worth making a note of. http://www.nature.com/nature/journal/v487/n7407/full/nature11256.html 31.170.166.17 (talk) 14:50, 10 September 2012 (UTC)
thread_title:  Grand design galaxy at z>2 

message: There is a move discussion in progress on Talk:Age of the universe which affects this page. Please participate on that page and not in this talk page section. Thank you.  —RMCD bot 22:15, 3 October 2013 (UTC)
thread_title: Move discussion in progress

message: This is simply wrong, as was detailed millions of times everywhere (see http://arxiv.org/abs/astro-ph/0310808 for example). I'm giving it a day or so, then I'll remove it.147.162.6.125 (talk) 12:46, 14 November 2014 (UTC)
thread_title:  "superluminal expansion" 

message: Hi, added a new section on fundamentals. you may want to adapt it a bit as I'm only 13 and got most of it from Princeton University website and Seife's Alpha and Omega
Kind regards,
TheHecster (talk) 16:11, 28 May 2015 (UTC)
thread_title: Fundamentals

message: Can I ask that an expert add a section or clarify existing sections as to what the Ekpyrotic universe hypothesis actually is? The article discusses the creators, the impetus for the hypothesis and the implications of it, but I cannot find a statement of the hypothesis itself. There is mention of the "original therory" but no description of that, nor any description of the "contemporary models". Simplification definitely has its place, and this is all good writing, but a deeper dive is requested.
47.21.153.202 (talk) 13:24, 8 June 2017 (UTC)
thread_title:  Clairfication 

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thread_title:  External links modified (January 2018)