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The Lem star system is the first star system Sidonia encounters with a habitable planet. The Lem system is most important because it is the first time Sidonia has a chance to seed a planet with human life. The Lem system also serves as the battlefield between the Large Mass Union Ship and Sidonia.
Planets[]
Lem IX
The Lem system contains nine planets, one of which is habitable. The habitable planet, Lem VII is an ocean planet, and serves as Sidonia's first colony. The outer gas giant, Lem IX, contains both a significant ring and several moons, operating as both a source of raw materials for Sidonia and a safe place for the assaults against the Large Mass Union Ship.
The Lem systems other planets are unknown at this time; presumably, none of them are habitable aside from Lem VII.
Sidonia interacts with several planets in the Lem system:
Colonization[]
The Large Mass Union Ship's attack on the moon colony
Once discovered, the Lem system is a powerful catalyst within the pacifist movement on Sidonia. At least 100,000 members of Sidonia wish to attempt the colonization, and an initial colony is started on Lem VII, with a support colony on Lem VII's moon. This colony, however, is short-lived - the Large Mass Union Ship destroys the moon colony, and Lem VII proves to be inhabited with Gauna.