Lunar Studies (2019) : - Study•ies (n.)
From c. 1300 as "a state of deep thought or contemplation, of the not-yet-so-opaque, mental perplexity or anxious thought, amazement, wonder or reverie" - Lunar (adj.)
from Latin lunaris "of the moon," Luna "moon"
from the greek word "Lùnca" same root of Lux and leuk, a proto-Indo-European root meaning "light, brightness.".