Callisto
Callisto is the outermost Galilean moon of Jupiter.
The outermost of Jupiter's four Galilean moons, Callisto appears as one of the settled worlds of the Jovian system. In real astronomy it is the second largest moon of Jupiter and the third largest in the Solar System, an ancient and heavily cratered body nearly as wide as the planet Mercury.
Within the Society, Callisto is ruled by its own ArchGovernor and is valued above all as a source of manpower, raising Grays and Obsidians in great numbers for the Society's armies. Like its Galilean neighbors, its ruling families are bound to Luna by ties of commerce. The moon first figures in Golden Son.
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