Segmentum Solar

The Segmentum Solar is a vast region of Imperial space centred on Terra and the Sol System. The Imperial Army shipyards for the Segmentum are located on Luna, and the Imperial Army headquarters in the Segmentum is based within Mars' Ring of Iron.

The Segmentum Solar is the central hub of the Imperium of Man and the most ancient and densely settled region of human space.

Notable Worlds

 * Terra (Hive World/Throneworld) - Terra is the Throneworld of the Imperium of Man and the original homeworld of Mankind and of the Emperor.
 * Luna (Dead World/Civilised World) - Luna is a densely settled Civilised World of the Imperium. Its massive population lives in great cities built deep below the lunar regolith. Luna is most famous for its gene-laboratories where the Emperor of Mankind made the genetic breakthroughs that would ultimately culminate in the creation of the Primarchs during the Primarch Project.
 * Mars (Forge World) - Mars is the greatest Forge World of the Imperium of Man, producing vast numbers of weapons, vehicles and other technology for the Imperial war efforts throughout the galaxy.
 * Khth'n (Mining World/War World) - Khthn'n is the homeworld of Araphel and main recruiting world of the Iron Revenants.
 * Feuerstadt (Death World) - Feuerstadt is the homeworld of Lukas Keath and main recruiting world of the Obsidian Guard.
 * Thecalia (Forge World) - Thecalia is a Forge World loyal to the Imperium, focused on producing weapons for the legions.
 * Cthonia (Feral World) - Cthonia was the barren and impoverished Imperial Feral World and former Mining World on which the Cthonian Basilisks were recruited.
 * Valeous II (Knight World) - Valeous II is the domain of Legio Interfector.
 * Ceres - Ceres is a small dwarf planet located within the Sol System's inner astroid belt. During the Five Ruins, Ceres was home to relay and communication stations that helped with communications between the inner and outer reaches of the system.
 * Molech - Molech was a verdant Knight World located only a few short light years from Terra itself. This world was ruled by the ancient noble family of House Devine. During the Dark Age of Technology, the Emperor was said to have traveled there on a one-way spacecraft, and found a gateway into the Realm of Chaos, where he made a devil's bargain with the Ruinous Powers. When he re-emerged into the material realm from the Immaterium, he had become imbued with new powers and the knowledge of how to create the genetically superior Primarchs.
 * Jupiter - Jupiter is a massive gas giant and is the fifth planet in the Sol System. The space docks and workshops that orbit Jupiter are home to massive Imperial Army Shipyards controlled by the Tech-priests of Mars. During the time of the Five Ruins, the moons of Jupiter were known to have habitats for the workers of the shipyards in Jupiter's orbit.
 * Tentrion - Tentrion is a world of sprawling cities and manufactoria of prodigious output, a formerly long-abandoned remnant of the glory days of the Age of Technology. This world was the site of one of the earliest campaigns of the Great Crusade outside of the Sol System. Deemed vitally important, the Compliance of Trention was deemed a high priority by Imperial forces, who wished to use the industrious planet as a staging point to push the Emperor's Great Crusade outwards.
 * Uranus - Uranus is a massive gas giant located in the Sol System. Though never habitable, it is home to orbiting Human colonies.
 * Venus (Industrial World) - Venus is an inner planet of the Sol System.
 * Voss (Forge World) - Voss is an Imperial Forge World, one of the first rediscovered by Mars in the early years of the Great Crusade, and has since become well known for producing many important patterns of weapons and vehicles for the Imperial Army, most notably several patterns of Autopistol and a pattern of the Lightning Fighter.
 * Phaeton (Forge World) - Phaeton is a major Forge World, close to the island world of Tahnel, which was the originator of the Leman Russ Tank and main supplier of equipment for drop troopers in the Imperial Army.
 * Necromunda (Hive World) - Necromunda is a vitally important Hive World located in the Imperium's Segmentum Solar.
 * Iliastus (Forge World) - A minor Forge World found early in the Great Crusade, it is the producer of the famed Iliastus Assault Cannon for the Monastic Ascendants.
 * Hatross (Forge World) - A minor Forge World that has ties to the Halcyon Wardens.

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