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Oort Cloud

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The Oort Cloud, also known as the Opik-Oort Cloud,[3] is a region of the Sol System[1], which contains dwarf planets, orphaned moons[2] and long-period comets.[3]


It only receives weak light from Sol's sun and was once home to Xenos creatures[2], until the Oort Cloud was cleansed by the First Legion, during the early days of the Great Crusade[1]. This occurred while the First's brother Space Marine Legions were still being formed and the creatures they slew were never named or categorized by the Imperium.[2]

During the Horus Heresy's Siege of Terra, parts of the Oort Cloud were enveloped by the massive Warp energy that began to spread across the Sol System, as the conflict neared its end.[3]