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Free-Floating Rogue Planet Civilizations

Free-floating rogue planet civilizations are one of the strangest and most atmospheric models in alien-civilization theory: societies existing on worlds that no longer orbit stars at all. Whether natural rogue planets, engineered habitats disguised as dark worlds, or civilization-bearing planets ejected from their native systems, the concept sits at the intersection of interstellar survival, hidden biospheres, and post-stellar civilization thought.