Ever heard the word "lunar"? It means "of or pertaining to the moon" and comes from Luna, the Roman version of Selene. Stellar, right?
If a person is "loony" that means they're crazy. This fun word comes from Luna, too, because back in the day people thought too much moonlight could make a person lose their minds.
In the world of Marvel Comics, Selene (a.k.a. the Black Queen) is a supervillain who constantly plagues the X-Men with her power absorbing abilities. (The real Selene sued Marvel for naming a bad guy after her, but it didn't go anywhere.)
In the classic and wonderfully weird silent film A Trip to the Moon, the natives of the moon are called Selenites.