APOD: Winter and Summer on a Little Planet (2024 Nov 30)

Comments and questions about the APOD on the main view screen.
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APOD Robot
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APOD: Winter and Summer on a Little Planet (2024 Nov 30)

Post by APOD Robot » Sat Nov 30, 2024 5:08 am

Image Winter and Summer on a Little Planet

Explanation: Winter and summer appear to come on a single night to this stunning little planet. It's planet Earth of course. The digitally mapped, nadir centered panorama covers 360x180 degrees and is composed of frames recorded during January and July from the Col du Galibier in the French Alps. Stars and nebulae of the northern winter (bottom) and summer Milky Way form the complete arcs traversing the rugged, curved horizon. Cars driving along on the road during a summer night illuminate the 2,642 meter high mountain pass, but snow makes access difficult during winter months except by serious ski touring. Cycling fans will recognize the Col du Galibier as one of the most famous climbs in planet Earth's Tour de France.

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johnnydeep
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Re: APOD: Winter and Summer on a Little Planet (2024 Nov 30)

Post by johnnydeep » Sat Nov 30, 2024 1:37 pm

"360x180" degrees?
--
"To B̬̻̋̚o̞̮̚̚l̘̲̀᷾d̫͓᷅ͩḷ̯᷁ͮȳ͙᷊͠ Go......Beyond The F͇̤i̙̖e̤̟l̡͓d͈̹s̙͚ We Know."{ʲₒʰₙNYᵈₑᵉₚ}

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Chris Peterson
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Re: APOD: Winter and Summer on a Little Planet (2024 Nov 30)

Post by Chris Peterson » Sat Nov 30, 2024 2:39 pm

johnnydeep wrote: Sat Nov 30, 2024 1:37 pm "360x180" degrees?
360 degrees of azimuth by 180 degrees of elevation. One hemisphere.
Chris

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johnnydeep
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Re: APOD: Winter and Summer on a Little Planet (2024 Nov 30)

Post by johnnydeep » Sat Nov 30, 2024 5:09 pm

Chris Peterson wrote: Sat Nov 30, 2024 2:39 pm
johnnydeep wrote: Sat Nov 30, 2024 1:37 pm "360x180" degrees?
360 degrees of azimuth by 180 degrees of elevation. One hemisphere.
Ah, thanks. So 360° around the full horizon, and 180° around the - in this case, Northern (in France) - celestial meridian.

--
"To B̬̻̋̚o̞̮̚̚l̘̲̀᷾d̫͓᷅ͩḷ̯᷁ͮȳ͙᷊͠ Go......Beyond The F͇̤i̙̖e̤̟l̡͓d͈̹s̙͚ We Know."{ʲₒʰₙNYᵈₑᵉₚ}

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Chris Peterson
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Re: APOD: Winter and Summer on a Little Planet (2024 Nov 30)

Post by Chris Peterson » Sat Nov 30, 2024 5:19 pm

johnnydeep wrote: Sat Nov 30, 2024 5:09 pm
Chris Peterson wrote: Sat Nov 30, 2024 2:39 pm
johnnydeep wrote: Sat Nov 30, 2024 1:37 pm "360x180" degrees?
360 degrees of azimuth by 180 degrees of elevation. One hemisphere.
Ah, thanks. So 360° around the full horizon, and 180° around the - in this case, Northern (in France) - celestial meridian.

Yes, though you don't need to invoke the meridian. Just the zenith. You can measure the altitude from any arbitrary azimuth.
Chris

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johnnydeep
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Re: APOD: Winter and Summer on a Little Planet (2024 Nov 30)

Post by johnnydeep » Sat Nov 30, 2024 5:37 pm

Chris Peterson wrote: Sat Nov 30, 2024 5:19 pm
johnnydeep wrote: Sat Nov 30, 2024 5:09 pm
Chris Peterson wrote: Sat Nov 30, 2024 2:39 pm

360 degrees of azimuth by 180 degrees of elevation. One hemisphere.
Ah, thanks. So 360° around the full horizon, and 180° around the - in this case, Northern (in France) - celestial meridian.

Yes, though you don't need to invoke the meridian. Just the zenith. You can measure the altitude from any arbitrary azimuth.
I see. I debated about mentioning the meridian, which I guess is only the path through the Zenith going through the North and South points on the horizon.
--
"To B̬̻̋̚o̞̮̚̚l̘̲̀᷾d̫͓᷅ͩḷ̯᷁ͮȳ͙᷊͠ Go......Beyond The F͇̤i̙̖e̤̟l̡͓d͈̹s̙͚ We Know."{ʲₒʰₙNYᵈₑᵉₚ}

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Re: APOD: Winter and Summer on a Little Planet (2024 Nov 30)

Post by BillBixby » Sat Nov 30, 2024 9:09 pm

And the lone human on the planet, at 7:30, possibly Camille Niel?