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*Mercury==History==*Venus*The birthplace of humanity on the planet Terra, the Sol System was fully colonized by humans by [[M15]].{{Fn|6}} During the [[Dark Age of Technology]] humanity expanded across the stars thanks to the invention of [[Warp Drive]]s and [[Navigator]]s, and in this period the Sol System was dominated by the empires of Terraand Mars which coexisted peacefully.{{Fn|7}} During the [[Age of Strife]] (Earth):*, the Sol System fell into complete anarchy. Terra collapsed into wars between [[LunaTechno-Barbarian]]*s while Mars reverted to complete isolation and religious worship of technology.{{Fn|8}} Salvation only came with the coming of the [[MarsEmperor]]*, who unified Terra, Mars, and then the entire Sol System into the fledgling [[JupiterImperium]]*during the [[SaturnUnification Wars]]:*and [[Titan (Moon)|TitanGreat Crusade]]*Uranus*Neptune*Pluto.{{Fn|7}}
→Celestial Bodies
{{redirect|Solar|the [[Macharian Sector]]'s currency|Imperial Currency}}{{redirect|Solar system|the general term for a set of objects orbiting a star or stars|System}}{{GalaxyPortal}}{{ImperiumPortal}}The '''Sol System''' or '''Terran System''' is the name of the [[Wikipedia:Solar System|Solar System ]] in the [[Age of the Imperium]]. The system is named for its sun, and is part of the [[Segmentum Solar]]. Its planets include Holy [[Terra]] and [[Mars]]. There are nine planets in the Sol system, some of which are also orbited by notable moons:
During the subsequent [[Horus Heresy]], the Sol System was the site of bitter fighting between loyalists and traitors during the [[Schism of Mars]] and [[Solar War]]. At the final phase of the war [[Horus]]' forces succeeded in capturing the Sol System and besieged Terra itself, but were eventually defeated and repelled during the [[Great Scouring]]. Since that time, the Sol System has not been the site of all-out war though it did see fighting during the [[War of the Beast]]{{Fn|9}}, [[Age of Apostasy]]{{Fn|10}}, and recently the [[Battle of Lion's Gate]].{{Fn|11}} The System was also saw a minor but mysterious [[Necron]] raid on Mars in late [[M41]].{{Fn|12}}
During the [[Noctis Aeterna]] the Sol System was threatened by the [[Khornate]] [[Crusade of Slaughter]] but subsequently defeated by an [[Indomitus Crusade]] fleet under [[Cassandra VanLeskus]].{{Fn|13}} In addition, [[Ganymede (Moon)|Ganymede]] became infested with [[Daemon]]s and the [[Grey Knights]] were forced to purge the planet.{{Fn|14}}
==Celestial Bodies==
[[Image:SolarWarMapBig.jpg|thumb|right|Map of the Sol System]]
*'''Sol''' - The singular [[Star]] of the system
*[[Mercury]] - [[Mining World]]{{Fn|3}}
*[[Venus]] - [[Industrial World]]{{Fn|3}}
*[[Terra]] - Throneworld of the [[Imperium]]
**[[Luna]] - Moon of Terra
*[[Mars]] - [[Forge World]] and capital of the [[Adeptus Mechanicus]]
**[[Phobos (Moon)|Phobos]] - Moon of Mars
*'''Asteroid Belt''' - Holds an innumerable amount of mining facilities and space colonies.{{Fn|17}}
**[[Ceres]] - Dwarf Planet{{Fn|2}}
*[[Jupiter]] - [[Forge World]]/[[Mining World]]{{Fn|3}}
**[[Ganymede (Moon)|Ganymede]] - [[Hub-Fortress]]{{Fn|14}}
*[[Saturn]] - [[Inquisitorial Fortress]]{{Fn|4}}
**[[Titan (Moon)|Titan]] - Moon of Saturn and [[Adeptus Astartes Homeworld|Homeworld]] of the [[Grey Knights]]
***[[Deimos]] - Sub-moon of Titan (previously a moon of [[Mars]])
**[[Enceladus (Sol)|Enceladus]] - Moon of Saturn.{{Fn|2}}
**[[Phoebe]] - [[Forge-Moon]] of Saturn.{{Fn|18}}
*[[Uranus]]
**[[Elysian Gate]] - One of the two stable [[Warp]] routes into the Sol System built during the [[Dark Age of Technology]].{{Fn|5}}
*[[Neptune]]
*[[Kuiper Belt]] - An asteroid belt beyond Neptune with various dwarf planets.
**[[Pluto]] - Dwarf Planet
***[[Khthonic Gate]] - One of the two stable [[Warp]] routes into the Sol System built during the [[Dark Age of Technology]].{{Fn|5}}
**[[Makemake]] - Dwarf Planet{{Fn|2}}
**[[Eris]] - Dwarf Planet{{Fn|2}}
Other celestial regions or objects of the Sol System include the [[Oort Cloud]],{{Fn|16}} [[The Comet]] and [[Artefact 9-Kappa-Mu]].
==Defences==
As the centre of the Imperium, the Sol System sports the heaviest known defences in the [[Galaxy]]. At the very edge of the System near the [[Mandeville Point]] are arrays of [[Star Fort]]s garrisoned by [[Regiment]]s of the [[Imperial Guard]]. The rest of the outer System is densely laced with thousand-mile-wide minefields, [[Imperial Navy]] patrol monitors, and enormous [[Hunter Servitor]]s. Past these is the core defences of the system, most notably the enormous [[Battlefleet Solar]] of the Imperial Navy. In addition to these forces, the [[Grey Knights]], [[Inquisition]], [[Adeptus Mechanicus]], and [[Adeptus Arbites]] all have substantial forces in-system deployed through endless bases, stations, and garrisons. At Terra itself orbits the massively powerful [[Imperial Fists]] battlestation known as ''[[The Phalanx]]''. Due to the massive daily influx of zealots, adepts, bureaucrats, merchants, pilgrims, and the like, daily security is screened heavily by the [[Adeptus Custodes]]. The Custodes maintain surveillance stations and listening devices throughout the System.{{Fn|3}}
Known [[Imperial Guard]] [[Regiment]]s based in the Sol System include the [[Palatine Sentinels]], [[Lucifer Blacks]], [[Jupiter Storms]], [[Auroran Rifles]], [[Granite Myrmidons]], [[Inferallti Hussars]], [[Orion Watch]],{{Fn|1}} and potentially the [[Terran Praefects]].
Known [[Star Fort]]s in the Sol System include the ''[[Oracle Maximus]], [[Prescience (Star Keep)|Prescience]], [[Taon Aegis]]'' and ''[[Eyrie Prime]]''. These are overseen by the [[Adeptus Custodes]].{{Fn|15}}
==Sources==
*{{Endn|1}}: [[The Hunt for Vulkan (Novel)]], Chapter 4
*{{Endn|2}}: [[The Solar War (Novel)]] - ''Map''
*{{Endn|3}}: [[Codex: Adeptus Custodes (8th Edition)]], pg. 29 — ''Sol System''
*{{Endn|4}}: [[The Beheading (Novel)]], Chapter Fifteen
*{{Endn|5}}: [[The Solar War (Novel)]], Chapter 2
*{{Endn|6}}: [[Galaxy in Flames (Novel)]]{{Cite Marker End}}, pg.280
*{{Endn|7}}: [[Codex Imperialis (Background Book)]], pg. 42
*{{Endn|8}}: [[Codex: Skitarii (7th Edition)]] - ''The Red Planet''
*{{Endn|9}}: [[Throneworld (Novel)]], Chapters 4-5
*{{Endn|10}}: [[Codex: Sisters of Battle (2nd Edition)]], pg. 13
*{{Endn|11}}: [[Warhammer 40,000 8th Edition Rulebook]], pg. 50
*{{Endn|12}}: [[Codex: Necrons (3rd Edition)]], pg. 11
*{{Endn|13}}: [[ White Dwarf July 2019]] - ''Indomitus Crusade Fleets''
*{{Endn|14}}: [[White Dwarf November 2019]], pg. 47
*{{Endn|15}}: [[Codex: Adeptus Custodes (9th Edition)]] pg. 12
*{{Endn|16}}: [[The Horus Heresy Book Nine - Crusade]], pgs. 81-100
*{{Endn|17}}: [[Ashes of the Imperium (Novel)]] - Chapter 26
*{{Endn|18}}: [[ Journal Tactica: The Forges of Saturn]], pg.3
[[Category:Planetary Systems]]
[[Category:Segmentum Solar]]
[[Category:Terra]]
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[[fr:Système Sol]]