Prometheus is the homeworld of the Halo: Reach action figures, except Michael. Prometheus is mentioned many times by the figures. It almost (it was almost visible) made its first appearance in Episode 41: Football. Prometheus will be seen near the end of the show within the last few episodes. Prometheus' fate will be in the final episode. Prometheus' main power source keeps the planet's surface White, but if destroyed (which the Original power source was by Frason), the white turns to gray, its atmosphere diminishes, and the planet can become a gray barren wasteland. The picture of Prometheus is similar to it, except the atmosphere is blue, like Earth's.
The white planet by blackmaddog

Prometheus (this was the closest I could use)

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