YOU SAID:
The moon is getting away
INTO JAPANESE
月が去っていく
BACK INTO ENGLISH
The moon is leaving
INTO JAPANESE
月が去っている
BACK INTO ENGLISH
The moon is gone
INTO JAPANESE
月が消えた
BACK INTO ENGLISH
The moon has disappeared
INTO JAPANESE
月が消えた
BACK INTO ENGLISH
The moon has disappeared
That didn't even make that much sense in English.