Sun up close. 1.5m GREGOR telescope.

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Sun up close. 1.5m GREGOR telescope.

Post by DeepSolar64 » Sat Sep 05, 2020 12:48 am

This is quite an interesting article. I still find it amazing on how much of it we can see and image.

https://www.cbsnews.com/news/high-res-i ... -up-close/


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Re: Sun up close. 1.5m GREGOR telescope.

Post by Carbon60 » Sat Sep 05, 2020 6:32 am

Stunning images and animation. Thanks for pointing us to this article, James.

Stu.


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Re: Sun up close. 1.5m GREGOR telescope.

Post by EGRAY_OBSERVATORY » Sat Sep 05, 2020 12:43 pm

That's correct James and those images are quite amazing.

Terry



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Re: Sun up close. 1.5m GREGOR telescope.

Post by DeepSolar64 » Sat Sep 05, 2020 5:38 pm

Many of us observed this spot when it was on the disc back in late July.


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Re: Sun up close. 1.5m GREGOR telescope.

Post by ffellah » Sun Sep 06, 2020 11:06 am

Nice article and impressive images, James. Thank you: always fun to look at large telescope images.

Franco



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Re: Sun up close. 1.5m GREGOR telescope.

Post by Montana » Sun Sep 06, 2020 11:43 am

Oh my word!! If only I could get granulation like that :hamster: it makes me drool just thinking about it :)

Alexandra



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Re: Sun up close. 1.5m GREGOR telescope.

Post by DeepSolar64 » Sun Sep 06, 2020 9:47 pm

Montana wrote:
Sun Sep 06, 2020 11:43 am
Oh my word!! If only I could get granulation like that :hamster: it makes me drool just thinking about it :)

Alexandra
I would love to be able to see them that easy.


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Re: Sun up close. 1.5m GREGOR telescope.

Post by DeepSolar64 » Thu Sep 17, 2020 4:58 am

A video on the 1.5m GREGOR solar telescope.



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Re: Sun up close. 1.5m GREGOR telescope.

Post by Carbon60 » Thu Sep 17, 2020 6:03 am

Thanks for this, James. It’s certainly an impressive bit of kit.

Stu.


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More images at http://www.flickr.com/photos/solarcarbon60/

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Re: Sun up close. 1.5m GREGOR telescope.

Post by Montana » Thu Sep 17, 2020 10:19 am

Fantastic! thanks for the link James. Wouldn't that be nice to say it was your solar setup :lol:

On another note, please share how you embedded this video in Solarchat? Mark and I have been trying to work this out for years as the media insert button doesn't work.

Alexandra



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Re: Sun up close. 1.5m GREGOR telescope.

Post by DeepSolar64 » Thu Sep 17, 2020 2:58 pm

Choose share on YouTube and copy the link it gives you. Then go to to your YouTube insert button in SolarChat and then paste the link once it is open there.


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Re: Sun up close. 1.5m GREGOR telescope.

Post by marktownley » Sat Sep 19, 2020 11:03 am

Thanks James!


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Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Re: Sun up close. 1.5m GREGOR telescope.

Post by Bruce G » Sun Sep 20, 2020 12:49 am

Fantastic animation. I get mesmerized by those things.

What are we seeing at 430 nm? This is apparently the CH G band. I found this:
"Whereas the main source of line opacity in the solar atmosphere is atomic lines, the solar spectrum also contains several strong molecular features. The most prominent among them are the CN violet system at about 380 nm and the CH G-band at about 430 nm. Interestingly, approximately a quarter of solar brightness variability on the timescale of the 11-year magnetic activity cycle comes from the molecular lines (Shapiro et al., 2015). The contribution of molecular lines to the spectrum increases for stars cooler than the Sun, and in the spectra of sunspots and pores, comparatively dark and hence cool concentrations of magnetic flux." (https://www.sciencedirect.com/topics/ea ... ar-spectra)

The idea of molecular bonding at these temperatures is twisting my mind a bit tonight. The interatomic forces would have to exceed the thermal energy. And aren't we dealing with plasma? The electrons of the atoms should be history, leaving the atoms with a net positive charge. Why would they like one another enough to form a molecular bond? I suspect that molecular bonds under these conditions may be a bit different from what I learned about in high school chemistry.



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