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None, but somehow breathable.
None (unless you count the Nefarious's Soldiers.)
Obani Gemini was the main moon of the moons that orbited the planet Obani in the Zygan System. It had an unusually small size and thus could be fully explored within a short space of time. The moon was surrounded by a ring of asteroids and had a very uneven surface featuring rivers of lava and small, grassy areas. Most notably, the moon was surrounded by a series of satellites and, by repairing the laser links between them it was possible to access the teleporter leading to the nearby moon, Obani Pollux.
- There is a glitch where if the player is on the asteroid belt, you can use your charge boots to "fly" to Obani Pollux without the use of the teleporter, and you could theoretically circle around the moon and return to Gemini. Additionally, you could also go to the third moon using the same glitch.
- Although no water was found in any state, the moon was covered in grass.
- Like Obani Pollux and the Jamming Array, there was regular gravity on the moon, which is physically impossible.
Gemini is the name of a real star constellation.
- Ratchet & Clank: Up Your Arsenal (first appearance)