Sundays Sodium Sun - 3rd June

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steveward53
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Re: Sundays Sodium Sun - 3rd June

Post by steveward53 »

I have to say , the more I look at that last image the more potential "features" or "artifacts" I can see , the human eye/mind combination has an amazing knack for this , I could circle dozens on that image alone ... ;)


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Re: Sundays Sodium Sun - 3rd June

Post by christian viladrich »

The eye/brain combination is very good at finding structure. There are even psychological tests where pseudo random feature are presented to the subject in a way to probe the mind of the subject ;-)

Just for the record, in the book "Planetary Astronomy", we have a whole chapter dedicated on visual observation with a description of a number of optical illusion (contrast, size, inversion of color, etc.).

This being said, the question is whether these structures are seen at the same time with different telescopes and observers. Solar satellite images are probably one of the best tools to test this. I don't remember what is the fastest acquisition rate available on MDI/SOHO or Hinode (or others). Having a look at these could be a good step forward.
In any case, there is a huge lot of images available everywhere for people wishing to investigate this subject with a proper methodology.

BTW, the main mode of photopheric oscillation is the 5-min. There are measured as velocity oscilations and irradiance oscillations (see Foukal or other sources). Is it possible to have an optical counterpart for it ? I've never seen a mention of it in a professional paper.
Still ... large size planetary nebulae are currently discovered by amateurs using very small size telescope, and working in relation with professionals ;-)


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Re: Sundays Sodium Sun - 3rd June

Post by arnedanielsen »

Very nice Mark!

Best regards,
Arne


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Re: Sundays Sodium Sun - 3rd June

Post by SteveZ »

Great shots Mark. I can not wait to see more from the Na Quark.


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Re: Sundays Sodium Sun - 3rd June

Post by marktownley »

SteveZ wrote: Tue Jun 06, 2023 7:39 pm Great shots Mark. I can not wait to see more from the Na Quark.
Thanks folks for all the comments, alas I no longer have the Na Quark, I sold it.


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Re: Sundays Sodium Sun - 3rd June

Post by DeepSolar64 »

marktownley wrote: Wed Jun 07, 2023 5:43 am
SteveZ wrote: Tue Jun 06, 2023 7:39 pm Great shots Mark. I can not wait to see more from the Na Quark.
Thanks folks for all the comments, alas I no longer have the Na Quark, I sold it.
To Terry, I think. I haven’t seen him on here in awhile. I hope he’s hanging in there.


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Re: Sundays Sodium Sun - 3rd June

Post by MAURITS »

Always nice to see sodium images Mark.


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