Once God Sakra (the leader of all gods & heaven) came to earth in a disguise of a hungry man. He then asked for food from a rabbit. The rabbit not thought not having anything to give, offered himself as a sacrificial source of food by lighting a fire and jumping into it, so that the person can eat him.

Honored and anstonished by this selfless act by the rabbit, God Sakra decided to honour the rabbit by carving the rabbit on to the moon to last forever. Thus to this day we can see the image of the rabbit on the moon...