APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)

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APOD Robot
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APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)

Post by APOD Robot » Tue Aug 15, 2023 4:06 am

Image A Triply Glowing Night Sky over Iceland

Explanation: The Sun is not the quiet place it seems. It expels an unsteady stream of energetic electrons and protons known as the solar wind. These charged particles deform the Earth's magnetosphere, change paths, and collide with atoms in Earth's atmosphere, causing the generation of light in auroras like that visible in green in the image left. Earth itself is also geologically active and covered with volcanoes. For example, Fagradalsfjall volcano in Iceland, seen emitting hot gas in orange near the image center. Iceland is one of the most geologically active places on Earth. On the far right is the Svartsengi geothermal power plant which creates the famous human-made Blue Lagoon, shown emitting white gas plumes. The featured composition therefore highlights three different sky phenomena, including both natural and human-made phenomena.

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orin stepanek
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Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)

Post by orin stepanek » Tue Aug 15, 2023 9:42 pm

TripleIceland_Zarzycka_1080.jpg
Wow; what a beauty, this photo is! Iceland has a beautiful night! :D
VolcanoStars_Vella_1080.jpg
I'd rather stay away from volcanos!
1000_F_189498933_OeutsN0mMlzJGaJZJvkXIsoSCUCFIO7W.jpg
Even kitty was amazed! 8-)
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Orin

Smile today; tomorrow's another day!

Roy

Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)

Post by Roy » Tue Aug 15, 2023 11:03 pm

That volcano is on the Reykyanes peninsula and has a Wikipedia entry of its own. About 64degrees N latitude
The aurora is quite striking and well explained. “Wind” is imprecise; the sun gives a “fast wind” of electrons and a “slower wind” of protons (heavier). Charged particles entering a magnetic field are forced in specific directions, concentrated at the poles. Ionization of atmospheric elements gives the colors.

ErasmusRoterodamus

Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)

Post by ErasmusRoterodamus » Wed Aug 16, 2023 1:01 am

With digital photo manipulation and the possibility of AI generated presentations, the "composition" notation is important; with AI an acknowledgement will be even more important!!

Anuradha Bhagwat

Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)

Post by Anuradha Bhagwat » Wed Aug 16, 2023 6:29 am

Aug 15th 2023 was the 77th Independence Day in India, and Indian flag has trocolours of Orange (of the sky), white (for purity) and green (for agriculture), and coincidently yesterday's NASA APOD had these tricolours over Iceland. Not sure if ut was a coincidence, but you could have mentioned it?

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Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)

Post by Guest » Wed Aug 16, 2023 6:30 am

Anuradha Bhagwat wrote: Wed Aug 16, 2023 6:29 am Aug 15th 2023 was the 77th Independence Day in India, and Indian flag has trocolours of Orange (of the sky), white (for purity) and green (for agriculture), and coincidently yesterday's NASA APOD had these tricolours over Iceland. Not sure if it was a coincidence, but you could have mentioned it?

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johnnydeep
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Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)

Post by johnnydeep » Wed Aug 16, 2023 12:21 pm

Anuradha Bhagwat wrote: Wed Aug 16, 2023 6:29 am Aug 15th 2023 was the 77th Independence Day in India, and Indian flag has trocolours of Orange (of the sky), white (for purity) and green (for agriculture), and coincidently yesterday's NASA APOD had these tricolours over Iceland. Not sure if ut was a coincidence, but you could have mentioned it?
A pleasing coincidence I'm sure. The writers of the APODs can't possibly know about everything.

And you did just mention it!
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