P9G-844 was a planet in the Milky Way settled by the group of Sodan more than 5,000 years ago, when they were trying to locate Kheb. The world was an Ancient-controlled planet, possibly outpost, millennia ago that is still is protected with an Ancient transporter that sends people to a remote part of the planet, behind the Mountains of Dor Tanak. These mountains are a most fierceful place, where many have lost their lives in the difficult terrain. Also protecting the planet's inhabitants are Invisibility devices built using Ancient designs. (SG1: "Babylon")