The Earth’s moon holds a special place in the human heart: it exists not only as our nearest celestial neighbor, it is also one of the richest sources of metaphor and poetry. Despite Shakespeare’s denigration that “the moon's an arrant thief, And her pale fire she snatches from the sun,” the moon has a long history in literature, poetry and song. The word itself comes from O.E. mona, but the etymology is so rich, I’ll quote www.etymonline.com: from P.Gmc. *mænon- (cf. O.S., O.H.G. mano, O.Fris. mona, O.N. mani, Du. maan, Ger. Mond, Goth. mena “moon”), from PIE *me(n)ses- “moon, month” (cf. Skt. masah “moon, month;” Avestan ma, Pers. mah, Armenian mis “month;” Gk. mene “moon,” men “month;” L. mensis “month;” O.C.S. meseci, Lith. menesis “moon, month;” O.Ir. mi, Welsh mis, Bret. miz “month”), probably from base *me- “to measure,” in reference to the moon's phases as the measure of time. In Greek, Italic, Celtic, Armenian the cognate words now mean only “month.” First used to describe the satellites of other planet's 1665.
Shakespeare quote from Timon of Athens.
Moon image courtesy www.briancasey.org