Talk:Stellar corona

message: the world is yoursLuc Viatour 
Fplay 01:32, 12 December 2005 (UTC)
thread_title:  Original research? 

message: Phonons conduct heat in metals, does fusion and or the density of mass inside a star affect the function of phonons?  "Dulling" them so that the heat is present in the corona, and not at or below the surface?  IDK. Thanks for reading. User: McTrixie --71.124.219.87 17:13, 27 August 2006 (UTC)
thread_title:  Coronal heating problem 

message: I felt there should have been some information on solar flares, given off during corona,as they do reach thousands of miles into space,and is a main factor in this topic! Wongdai 09:08, 5 April 2007 (UTC)
thread_title:  should have been in 

message: The article asserts that the corona is thousands times hotter than the surface and then goes on to explain that there is no single accepted theory to explain it. The article fails to clarify how we even know that the corona is hotter in the first place. Precisely what observations lead astronomers to that temperature conclusion? — Timwi 15:41, 25 May 2007 (UTC)
replies: text: It was determined by Bengt Edlén using spectroscopy. The demiurge 16:15, 25 May 2007 (UTC)

text: It can be determined using few methods. Primary and original method was the observation of high ionization of atoms by their absorption spectra, which can only occur at very high temperatures. Initially it was not know which atoms / elements these are, and even postulated to be some new element, but later using experiments in Earth labs, and using mathematics of quantum mechanics, it was determined these are pretty normal and expected elements, just at very high ionization state, thus high temperature. But the temperature can also be determined by Doppler broadening thermometry (using Doppler broadening of spectra peaks to measure temperature - as temperature increases, the average atoms velocities increase, thus the peaks are less sharp and becomes broader, by measuring it, the speed can be determined, and thus the temperature). The mathematical analysis (to also take into account other factors and sources of broadening, and in some situations narrowing) is a not trivial, but not too complex either really. 2A02:168:2000:5B:E5C5:F26D:B2D7:4CEF (talk) 14:21, 19 March 2021 (UTC)
thread_title:  How do we know the corona is hot? 

message: Corona is a latin world; I remember the greek form στέφανον (stephanon) for "crown". Roberto
:Not only that, but corona is a common word that means a lot of things, as can be seen by the disambiguation page.  It's funny that no place does Wikipedia define the source of this wide-spread word, which, like you said - is "crown".  Isn't it a particular type of crown?Jimhoward72 (talk) 18:32, 14 August 2011 (UTC)
thread_title: Meaning of "Corona"

message: I took some solar physics 10 years ago (I'm really a cosmologist), and we did some pretty hefty math on the corona heating problem. I remember the conclusion was that it would be surprising if the corona had not been extremely hot, there is so much energy dumped there. But this being 10 years ago, I don't feel really up to the task of improving the article, but I feel that the "unsolved mysteries" tag is now inappropriate. Kjetil Kjernsmo (talk) 21:45, 12 September 2008 (UTC)
thread_title:  A solved problem? 

message: A computerised algorithm has generated a version of this page using data obtained from AlgaeBase.  You may be able to incorporate elements into the current article. Alternatively, it may be appropriate to create a new page at Corona (alga). Anybot (contact operator) 18:09, 21 February 2009 (UTC)
thread_title:  Bot-generated content 

message: Added new section on this. There is already a section on helioseismology (which I've been expanding lately) so it seemed appropriate. Puzl bustr (talk) 20:07, 23 November 2009 (UTC)
thread_title:  [[Coronal seismology]] 

message: So I noticed that the word kelvins was used several times in the article when referring to the unit kelvin. Now, I've taken several physics classes and we always refer to the unit in a singular form (kelvin), and use K or kelvin when writing it down, so I changed the kelvins for kelvin and K because I thought it more appropriate. I am not however really a 100% sure that kelvins in plural isn't correct as well. Koszmonaut (talk) 02:57, 27 June 2010 (UTC)
thread_title:  Kelvin vs. kelvins 

message: I feel like, "During a total solar eclipse, the solar corona can be seen by the naked eye." is bad wording because it makes it seem like staring at a solar eclipse is okay. Does anyone agree?  — Preceding unsigned comment added by Thisaccountisbs (talk • contribs) 16:06, 12 May 2014 (UTC)
thread_title:  Picture Caption Phrasing 

message: Video(s) and/or images of Solar Storm activity between October and November of 2003 are referenced in this article, however, these images and/or video(s) are not present in the article. Strongly suggest to edit the section accordingly to: 
* Include the media in question, 
* Provide an in-section direct link to the media(possible sub-header for the section?), or  
* Change the phrasing of the article away from assuming the reader is viewing this media.
:(response to above unsigned post starts here) The videos are missing because they were deleted from Commons due to copyright concerns. Presumably this means they can't be put back. I also discovered that a large chunk of the text was lifted directly from the same NASA site that the videos originally came from (without them being credited as the source, by the way). So if we were to include links to those videos, the text here would be rendered pretty much redundant. Should the section just be deleted, with maybe a reference added under External Links? 78.145.112.78 (talk) 08:00, 23 November 2015 (UTC)
replies: text: I'd say delete the section. Phrasing and tone doesn't really fit the rest of the article. Will the Great (talk) 03:24, 29 January 2017 (UTC)
thread_title:  Missing Images/Video in Section 'A Solar Storm' 

message: "Solar physicists have captured the first direct observational signatures of resonant absorption, thought to play an important role in solving the "coronal heating problem" which has defied explanation for over 70 years.
"An international research team from Japan, the U.S.A., and Europe led by Drs. Joten Okamoto and Patrick Antolin combined high resolution observations from JAXA's Hinode mission and NASA's IRIS (Interface Region Imaging Spectrograph) mission, together with state-of-the-art numerical simulations and modeling from NAOJ's ATERUI supercomputer. In the combined data, they were able to detect and identify the observational signatures of resonant absorption."
(http://www.sciencedaily.com/releases/2015/08/150824064742.htm)
-- Jo3sampl (talk) 01:49, 26 August 2015 (UTC)
thread_title:  Resonant absorption -- useful when secondary source found? 

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thread_title:  External links modified 

message: Hello fellow Wikipedians,
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thread_title:  External links modified (January 2018) 

message: It would be great if someone could add a short paragraph outlining the difference between corona being really hot and what everyday objects being hot mean for laymen. If you blocked all the radiation from the Sun, would being inside the corona burn you to a crisp or would you freeze to death despite being inside a few million K region? How does the new solar probe survive the coronal temperatures of million K with a heat shield that only survives 1500K?
:The corona has a very low density of about 1 cm−3 or less and can not seriously heat a spacecraft. Ruslik_Zero 20:36, 11 August 2018 (UTC)
thread_title:  Hot in physics vs hot in everyday life 

message: I came here looking for solid information about the Sun's Corona. I am disappointed. The following is the best I can piece together (but may be way off): 1.) There is no precise definition of the Corona. 2.) The photographs (coronagraphs) show the K-Corona (mostly), and the photos only picture it extending to several million km. (which can be seen by simply looking at its size relative to the Sun). 3.) The E-Corona is superimposed over the K- (and I suspect F-) corona, it is not a (physically) separate structure.(although we can argue about what 'separate' means.) 4. The F-Corona extends far out into space and may include the Earth's orbit. (This one is unclear to me, my best guess is that since it (the F-) is caused by dust scattering sunlight, that it could be argued to extend as far out as the heliopause. 5.) The (only?) difference between the "Corona" and the Solar Wind is that the Solar Wind has "escaped" the Sun's gravity. The disance above the Sun this may occur depends on each particle's speed (and direction). An average H atom at 1 million degrees Kelvin will be traveling at escape velocity at ~10 million km from the Sun, which is over 20 times the radius of the Sun (and is roughly 0.1AU). 6.) For me, there seems to be no logical reason to distinguish between the (K-) Corona and the Solar Wind. Or stating it another way, there appears to be no way to locate the division between the two (which, as the article states, varies with local conditions). I'd guess for the experts that it depends on what instrument he or she is using at the time. (i.e. "What my instrument has collected data on is what I'm talking about when I use the term").75.90.39.77 (talk) 19:07, 13 August 2018 (UTC)
thread_title:  Muddled and weak. 

message: There is a move discussion in progress on Talk:Corona (disambiguation) which affects this page. Please participate on that page and not in this talk page section. Thank you.  —RMCD bot 21:17, 29 March 2020 (UTC)
thread_title:  Move discussion in progress 

message: On https://en.wikipedia.org/wiki/Sun in the characteristics box there is a link to "solar corona" (see temperature). The preview is weird: "Hello I am or Ayham or Jay". I can't fix it. Tazelaar (talk) 09:31, 4 March 2024 (UTC)
replies: text: I got this too. It looks like the outdated lead from diff. It did not change for me after purging and also appears on other pages that link to Stellar corona. I have made a new edit to the page, and that appears to have fixed it. CoronalMassAffection 𝛿 talkcontribs 16:55, 4 March 2024 (UTC)
replies: text: It seems to have been fixed for me to. Nice work! Tazelaar (talk) 15:21, 5 June 2024 (UTC)
thread_title:  Strange preview on other page 

message: There are a few links on this page to the equivalent pages in other languages. However, most links to on other languages wikis are on the Solar corona page. I don't know how to fix that. can someone help brink back all the links from the redirect page to this page? Wikidata doesn't want two pages to point to some other language's page. Alternatively, perhaps moving the article to Solar corona and making this page the redirect might be the answer. Dhrm77 (talk) 10:55, 10 April 2024 (UTC)
thread_title:  Languages links