Green sky band
Taken by MarcellaGiulia Pace on February 18, 2026 @
Ragusa, Sicily-ITA
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Camera Used: NIKON CORPORATION NIKON Z 50
Exposure Time: 1/4
Aperture: f/6.3
ISO: 100
Date Taken: 2026:02:19 04:52:07
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Details:
During twilight, the sky can sometimes arrange itself in rainbow-like colours. Between the red near the horizon and the higher blue of the sky, a thin green band may occasionally appear.
This is not a true rainbow: the phenomenon does not depend on water droplets, but on an atmospheric filtering of sunlight, involving scattering, ozone absorption, and the geometry of the Sun below the horizon.
The green is not perceived by staring at it directly; it emerges through contrast, much like faint deep-sky objects.
This Green Sky Band is not a visual illusion: it has been systematically studied by Anna Lange and Christian von Savigny, who clarified the physical conditions behind it, linked to ozone absorption in the Chappuis bands.
Camera: Nikon z50: 600 mm, 1sec.; f/6.3; 100 ISO
P.S.Additionally, two wide-field images acquired on 24 April 2023 near the island of Pantelleria (Italy) are provided
Photographer's website:
https://www.greenflash.photo
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