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It should be merged with the above article because it adds nothing that cannot otherwise be explained in a one or two sentence statement in that article as it is done here. And in fact, it is more contextually appropriate in that article as well. Anyone have any objections to merging it? Astrobayes 20:41, 23 June 2006 (UTC)
I did a bit of heavy editing. There were a few factual inaccuracies (or fuzzy statements), for example
Also it wasn't really clear why things had to be a list. Anyway, I hope that the edits kept the sense and intention of the original information. If you don't think so let's talk and come up with a better solution. Wesino 18:59, 23 November 2006 (UTC)
I'm concerned about our event horizon definition, which right now reads --
I don't think that "now" really has any meaning in this context as there is no simultineity in GR, so it seems this def could be cleaned up. Wesino 22:20, 5 May 2007 (UTC)
Of course, I'm sure its me but I failed to see any (estimated) numerical value for the particle horizon. Hence my conclusion that this article needs work. If you didn't answer the question any 6 year old would ask (namely "but how far IS it?") then you probably aren't being very helpful to most people (and are directing your writing towards the geeks). —Preceding unsigned comment added by 69.40.243.166 ( talk) 21:28, 2 February 2008 (UTC)
Generally, I found it very odd to land here from the Dark Flow page (this is linked from its 3rd paragraph) and to be almost immediately faced with a wall of mathematics that are unclear to a poor layman who would find this indecipherable. It might help to either include a link to a main article explaining the particle horizon in more general terms or to expand this article with an opening section. To clarify a bit, the Dark Flow article states a Particle Horizon of 46 billion light years. Given the Universe is ~14 billion years old, there's a 32 billion light year gap to leave the public scratching their heads over. The article as it stands does nothing to resolve such confusion. 86.46.117.189 ( talk) 13:11, 8 June 2014 (UTC)
The page says the conformal time today is 1.48*10^18 a bit down the page. But this value is dependent on the Hubble constant. It makes sense to put also the Hubble constant value that the person that has put this value have used. This because there is still large uncertainty in the value of the Hubble constant. This so the page do not cause confusion when students finds other values in books etc. But ball park the value is correct, it is just one need to tell what Hubble constant value is used to get it. ChrisCalif ( talk) 09:37, 23 May 2021 (UTC)
The particle horizon today is 14.4 Gpc, and that of recombination is 284 Mpc which is 1.9722E-02 of 14.4 Gpc. However, 8.9E-03 is written in the equation, which would be a typo. If possible, I would like to learn how the particle horizon values of recombination and today are determined. RetiredEng ( talk) 13:48, 9 May 2023 (UTC)
![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||||||||||||||||||
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It should be merged with the above article because it adds nothing that cannot otherwise be explained in a one or two sentence statement in that article as it is done here. And in fact, it is more contextually appropriate in that article as well. Anyone have any objections to merging it? Astrobayes 20:41, 23 June 2006 (UTC)
I did a bit of heavy editing. There were a few factual inaccuracies (or fuzzy statements), for example
Also it wasn't really clear why things had to be a list. Anyway, I hope that the edits kept the sense and intention of the original information. If you don't think so let's talk and come up with a better solution. Wesino 18:59, 23 November 2006 (UTC)
I'm concerned about our event horizon definition, which right now reads --
I don't think that "now" really has any meaning in this context as there is no simultineity in GR, so it seems this def could be cleaned up. Wesino 22:20, 5 May 2007 (UTC)
Of course, I'm sure its me but I failed to see any (estimated) numerical value for the particle horizon. Hence my conclusion that this article needs work. If you didn't answer the question any 6 year old would ask (namely "but how far IS it?") then you probably aren't being very helpful to most people (and are directing your writing towards the geeks). —Preceding unsigned comment added by 69.40.243.166 ( talk) 21:28, 2 February 2008 (UTC)
Generally, I found it very odd to land here from the Dark Flow page (this is linked from its 3rd paragraph) and to be almost immediately faced with a wall of mathematics that are unclear to a poor layman who would find this indecipherable. It might help to either include a link to a main article explaining the particle horizon in more general terms or to expand this article with an opening section. To clarify a bit, the Dark Flow article states a Particle Horizon of 46 billion light years. Given the Universe is ~14 billion years old, there's a 32 billion light year gap to leave the public scratching their heads over. The article as it stands does nothing to resolve such confusion. 86.46.117.189 ( talk) 13:11, 8 June 2014 (UTC)
The page says the conformal time today is 1.48*10^18 a bit down the page. But this value is dependent on the Hubble constant. It makes sense to put also the Hubble constant value that the person that has put this value have used. This because there is still large uncertainty in the value of the Hubble constant. This so the page do not cause confusion when students finds other values in books etc. But ball park the value is correct, it is just one need to tell what Hubble constant value is used to get it. ChrisCalif ( talk) 09:37, 23 May 2021 (UTC)
The particle horizon today is 14.4 Gpc, and that of recombination is 284 Mpc which is 1.9722E-02 of 14.4 Gpc. However, 8.9E-03 is written in the equation, which would be a typo. If possible, I would like to learn how the particle horizon values of recombination and today are determined. RetiredEng ( talk) 13:48, 9 May 2023 (UTC)