P3X-474 was a planet in the Milky Way galaxy which held a Stargate and Dial Home Device. The Odyssey, while under attack from the Ori, traveled to the planet and beamed down all of its crew except Major General Henry Landry and SG-1, so that they could return to Earth safely. Shortly after, SG-1 created a time dilation field to protect themselves from an incoming blast form an Ori warship. They were inside of it for around fifty years before they finally figured out a way to reverse the field and escape. (SG1: "Unending")

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