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A planet was a stellar object massive enough to generate sufficient gravity to form a spherical shape. Planets orbited nearly every star in the known galaxy. Larger than moons and asteroids, they ranged from airless rocks balls of ice to gas giants and terrestrial worlds teeming with life. Planets often had natural satellites, called moons. A common military philosophy held by most factions was that to control space, they had to control the planets.
See Category:Planets for a full list of planets.