Oa is a planet near the center of the universe. It is the home of the Guardians, one of the most technologically advanced civilizations in the universe, even more advanced than Kryptonians. It is also serves as the headquarters of the Green Lantern Corps, the intergalactic police organization.
- Green Lantern Corps (First appearance)
|Green Lantern universe|
|Media||Green Lantern Corps|
|Characters||Hal Jordan | John Stewart|
|Miscellaneous||Green Lantern Corps | Oa | Green Power Ring | Green Power Lantern | Emotional Electromagnetic Spectrum | Green Lantern Uniform | Green Lantern Oath | Guardians of the Universe | Power Ring | Ferris Air | Coast City|