Thamos is a gas giant in the Rubycon II System located between the Calixis Sector and the Koronus Passage that leads to the Expanse. It and its twin, the gas giant Carlon, are the most notable natural features of the system and orbit far away from the star. Both gas giants were named after the sons of Vivaldi Jontur, the Rogue Trader who charted the system. Of the two, Thamos is farther from the star. planets are mostly hydrogen and helium, but Thamos has a larger percentage of ice, in the form of water, ammonia, and methane. Neither has any moons and only a smattering of attendant asteroids in stable co-orbital positions, as if a strong wind had swept away most of the normal formations which surround such planets. Vast scoopships mine both planets for their gases, selling them at the port for processing into fuel and organic base matter.