The hostile moon Caleston is the largest satellite of the gas giant Cernunnos. An ancient asteroid strike deposited major loads of element zero within the molten sulfur mantle. Eldfell-Ashland Energy’s mining operations have made it the largest source of starship drive core material in the Attican Traverse.
Caleston is wracked with volcanism due to tidal stresses from Cernunnos. Because of the weak solar output, plant-like life on Caleston is not carbon-based and photosynthetic but silicon-based and thermosynthetic, requiring heat rather than sunlight to power its chemical reactions. These organisms flourish in volcanic vents and during solar flares when Balor can double or triple in luminosity. Sadly, sapient habitation is not possible here and Caleston’s biodiversity is considered “threatened” by the Citadel Council Committee on Habitable Worlds.