P3X-500

P3X-500 was a desert planet, the closest one in the Stargate network to P3W-451. SG-1, shortly after rescuring SG-10 from the black hole which was engulfing P3W-451, crash landed a tel'tak on the planet after Daniel Jackson observed that it most probably once housed a Celtic civilization. From there, they were able to return to Earth through the Stargate where they faced their punishment for stealing Kinahhi anti-gravity technology.