There are a few expressions with this word like I love you to the moon and back. It is used to express how much someone love a person and It is used to illustrate the vastness of their love. The origin of this expression is not clear but in Tom Topor's play Nuts, a character express this form of expression : « When I was a little girl, I used to say to her, 'I love you to the moon and down again and around the world and back again’ ». This expression uses the distance and dramatize the extent of love and because of the exploration of the moon in the 60s, it may have boosted the idea of…