Sunset colors vary with the atmospheric conditions that sunlight must pass through, determining what causes a pink sunset.
Why Does the Sky Sometimes Turn Purple?
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Sunset color science: why the coldest months of the year produce
Red sky at morning - Wikipedia
Why Is the Sky Pink? The Science Behind Pink Skies - Color Meanings
Why does the sky turn pink?
Antitwilight Arch
Why the Sky Changes Color at Sunset
SunLive - Pinks skies at night – what causes them? - The Bay's