New research suggests that this coin marks an eclipse of Jupiter by the moon. It happened on January 17, 121 BC and was visible in Antioch, the capital of the Seleucid Empire. The coin itself show Zeus with a crescent moon above his head and a star like object hovering above the palm of his right hand... On one side is a portrait of Antiochos VIII, the king who minted it. On the reverse is a depiction of Zeus, either nude or half-draped, holding a sceptre in his left hand. Above the god's head is the crescent of the moon,...