In addition to Betelgeuse, Antares and Mira have also been resolved via interferometry:

http://isi.ssl.berkeley.edu/research.htm

Mira has been imaged by the HST:

http://www.ras.ucalgary.ca/SKA/science/node14.html

Dave Mitsky

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Chance favors the prepared mind.
De gustibus non est disputandum.
Never attribute to malice that which can be adequately explained by stupidity.

Sorry folks, the images are stills from a movie from the SOHO CD-ROM called "SOHO-Exploring the Sun". I can't find the movie on the SOHO website, but if you want to see it, e-mail me and you can check for yourself that this accusation is unfounded. If these images are "doctored" then it's the SOHO team that did the doctoring.
Cheers?

I have to agree with VanderL here, i have the same CD. I am always perusing the SOHO website - if they were doctoring they will have a lot to answer for!

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Damien,
International Baccalaureate Physics teacher
Optics, Photogrammetry and Remote Sensing Instrumentation Major
Admin: Pacific Science and Art

Perhaps I was incorrect about the doctoring, but the pictures are misrepresented. The pictures seem terribly fuzzy to me. There are many, many pictures, that are more in focus, that would have served. I maintain the site is using the photos under false pretenses.

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Insanity: doing the same thing over and over again and expecting different results.
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They are stills from a movie, if you look at the movie is is all much clearer, and the fuzziness is real, plasma doesn't always behave ordered. As for the false pretenses, the movie was made to show the plasma ring and that's what is stated.
Cheers.

I've read somewhere that the helioseismology data are also consistent with a completely homogenous solar interior, if the standard model is correct the interior must be layered in distinct regions. Would the Iron Sun model need a more complex interior than the standard model? How does the Iron Sun model conflict with the inferred solar interior?

Faulkner said that Achernar is encircled by a plasma ring, does anyone know the reference?
Thanks.