Moonlight is light from the surface of the Moon, consisting mostly of reflected sunlight, and some earthlight. History. The ancient Greek philosopher Anaxagoras noted that "the sun provides the moon with its brightness". Ancient Chinese polymath Zhang Heng concluded that the light of the moon comes from the Sun. He writes in his treatise, The Spiritual Constitution of the Universe, that the Sun and Moon are "like fire and water", where the Sun "gives out light", and the Moon "reflects it".
https://en.wikipedia.org/wiki/Moonlight