Two distinct Arabic words, 'Diya' (ضِيَاء) for the sun and 'Nur' (نُور) for the moon, accurately distinguish between self-generated and reflected light.
Yunus
Verse 5
هُوَ الَّذِي جَعَلَ الشَّمْسَ ضِيَاءً وَالْقَمَرَ نُورًا وَقَدَّرَهُ مَنَازِلَ لِتَعْلَمُوا عَدَدَ السِّنِينَ وَالْحِسَابَ
"It is He who made the sun a radiance and the moon a light, and determined phases for it, that you may know the number of years and the calculation."
The verse uses two distinct Arabic words: Diya (ضِيَاء, intrinsic radiance) for the sun and Nur (نُور, reflected or borrowed light) for the moon. This accurately distinguishes the sun as a self-luminous body from the moon as a reflector of sunlight, a scientific fact not confirmed until modern times and not distinguished in any comparable ancient text. No other classical Arabic source makes this terminological distinction in the same cosmological context.
Comparative lexical analysis of 'Diya' and 'Nur' across all Quranic usages and classical Arabic dictionaries.
Classical scholars including Ibn Kathir and Al-Tabari noted this distinction; modern commentators have highlighted its scientific dimension.
Milestone Illuminated
First Light
Discovery
Discover your very first reflection. Every universe begins with a single point of light.