P5S-381 is the Tau'ri designation for a planet in the Milky Way galaxy with a very strong ozone layer, which was why the planet was chosen to become the new homeworld of a large group of Enkarans, who need a thick ozone layer to prevent blindness due to an increased sensitivity to UV light.
However, in 2000, the planet was chosen by a large vessel to be terraformed to become the new homeworld of the Gadmeer.
SG-1 negotiated between the Gadmeer and the Enkarans, and in the end the vessel was used to transport the Enkarans to Enkara, their original homeworld (which doesn't have a Stargate). Afterwards, the planet continued to be terraformed. (SG1: "Scorched Earth")
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| Individuals | Caleb · Eliam · Hedrazar · Jonathan · Lotan · Nikka · Tadaaki |
| Planets | Enkara · P5S-381 |
| Planets | P5S-381 • Gadmeer homeworld |
| Technology | Gadmeer device • Gadmeer historical archive • Gadmeer hologram • Gadmeer terraformer • Gadmeer transporter • Terraforming |