Kerithis (Moon)

Kerithis, also known as Spheron II or Geometrica VIb, is one of the three moons of the planet Spheron and is named after the planet of the same name. It is one of the two smaller "starter" moons of Spheron, both of which formed along with the planet. The other starter moon is Kerithis' sister moon Arcaelion. Like Arcaelion, Kerithis is tidally locked to Spheron, with one side constantly facing the planet. Kerithis is the outermost starter moon, Arcaelion being slightly closer to Spheron. Like Arcaelion, Kerithis is one-fourth the size of Spheron, and like all the celestial bodies in the Geometrica System, was formed by the angel Michael Clearwater using the Genesis ability. Like its sister moon Arcaelion, Kerithis orbits Spheron in a direction opposite to the planet's rotation. Kerithis is occasionally known as the "Martyr Moon" owing to the fate of its namesake, the planet Kerithis from the Arcaelion System, which was pulverised by fragments from the explosion of the former Spherimal homeworld of Archenar. Though the planet itself was destroyed, it gave the escaping transports a window of shelter from the rocks, allowing the surviving Spherimals to escape their home system and begin the search for a new home.

Kerithis, like Arcaelion, suffers from a "Season of the Metal Tricksters", a period of intense magnetic storm activity on the surface and in the skies. Both moons are known for the stunning auroras caused by these storms, and occasionally experience the storms at the same time, due to gravitational interaction between the moons and the overlapping magnetic fields.

Kerithis, like all the moons of Spheron, is home to its own biosphere. Kerithis' biosphere is largely similar to that of its parent planet, but also features some species that are unique to the moon. Like Arcaelion, Kerithis is not completely Spherimal-inhabited, so as to provide living space for the native animals already living there. The moon also serves as a tourist destination and is a popular honeymoon destination for newly-married Spheronians.