NWS — types of twilight

الأرصاد الأمريكية — أنواع الشفق

Modern civil/nautical/astronomical definitions,not historical priority evidence.

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islam.museum contributors. “NWS — types of twilight”. islam.museum, https://islam.museum/en/source/noaa-twilight-types/. CC BY-SA 4.0. Last updated 2026-11-06.

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