The Moon Reflects Sunlight
The Quran distinguishes between the light of the sun and the light of the moon using two different Arabic words: one implying a self-generated source, the other a reflected light. This distinction was not scientifically established until centuries later.
The Distinction in the Quran
In Surah Yunus (10:5), God says:
"It is He who made the sun a shining light (diya) and the moon a reflected light (nur)."
The Quran uses two distinct Arabic words. Diya (used for the sun) refers to a blazing, self-generated light. Nur (used for the moon) refers to a softer, derived or reflected light. The same distinction appears in Surah al-Furqan (25:61) and Surah Nuh (71:16).
This is not poetic variation. It is a consistent, deliberate terminological choice maintained across multiple surahs revealed at different times.
What Was Known in the 7th Century
The prevailing understanding in ancient and medieval astronomy (including in Arab culture) was that celestial bodies each possessed their own light. The Quran's consistent use of two distinct Arabic terms (noor for the moon, diya' for the sun) reflects a precision in the original text that goes beyond what the immediate audience had any reason to prioritise linguistically, regardless of what Greek natural philosophy may have discussed.
The accurate understanding that moonlight is entirely reflected sunlight, with no self-generated component, is a product of modern astronomy.
Common Misconceptions
"Nur just means light in general." Nur and diya are used interchangeably in some contexts but not here. The Quran's consistent pairing (diya for the sun, nur for the moon) across multiple unrelated surahs indicates deliberate distinction.
Scholar References
- Quran: 10:5, 25:61, 71:16
- Classical Arabic lexicons on the distinction between nur and diya