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APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)
Posted: Tue Aug 15, 2023 4:06 am
by APOD Robot
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.
Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)
Posted: Tue Aug 15, 2023 9:42 pm
by orin stepanek
Wow; what a beauty, this photo is! Iceland has a beautiful night!
I'd rather stay away from volcanos!
Even kitty was amazed!
Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)
Posted: Tue Aug 15, 2023 11:03 pm
by Roy
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.
Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)
Posted: Wed Aug 16, 2023 1:01 am
by ErasmusRoterodamus
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!!
Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)
Posted: Wed Aug 16, 2023 6:29 am
by Anuradha Bhagwat
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?
Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)
Posted: Wed Aug 16, 2023 6:30 am
by Guest
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?
Re: APOD: A Triply Glowing Night Sky over Iceland (2023 Aug 15)
Posted: Wed Aug 16, 2023 12:21 pm
by johnnydeep
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!
