The phrase, to the moon and back, was apparently introduced in the children’s book Guess How Much I Love You, which was w worldwide bestseller by Sam MacBratney.
‘I love you right up to the moon’, said Little Nutbrown Hare.
‘Oh, that’s far,’ said Big Nut Brown Hare. ‘That is very far.’
Big Nutbrown Hare settled Little Nutbrown Hare into his bed of leaves.
He leaned over and kissed him good night.
Then he lay down close by and whispered with a smile,
‘I love you right up to the moon and back.’