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Eurobus (referred to as "Jupiter" by humans and as "Sasoom" by Barsoomians) is the fifth planet in the Solar System, located between Barsoom and Strio.

Though long speculated by Earthmen to be completely uninhabitable, the surface of the world is completely livable by humanoid life and has gravity slightly lower than Barsoom, despite the planet's size. John Carter attributes this phenomenon to the speed of the planet's rotation.


To its inhabitants, there is no day and night, the volcanoes that dot the world acting like torches lighting the atmosphere making the day perpetual and everything cast under a red light. The world is also covered in oceans and jungles, having a generally universal climate because of the volcanoes.


Many animals on the planet are ungulates, having hooves because of the volcanic terrain, and almost all flora has features of animal life. The planet hosts two sentient species - the Morgors and the Savators.