Moon:
noun:
a. the celestial body that revolves around the earth from west to east;
b. this body as it appears during a particular lunar month or period of time, or at a particular time of the...
'Whom' is used when you are referring to the object of the verb. 'Who' is used when you are referring to the subject of the verb.'Who is there?''Who broke that vase?''For whom is that parcel...