The Moon a Ghostly Galleon

Someone says he knows how to work out scientifically where Asgard, the Sternekinder homeworld, might be. This comes just in time - the Sternekinder have launched attacks that have devastated five United States of the Zodiac planets, and the rest of the USZ is choked with refugees. But is the theory genius, or crackpot? And on Asgard, someone else is waiting - someone everyone had thought long dead. Someone even the Sternekinder are afraid of. But is the enemy of Ant and Cleo's enemies truly their friend?