Oa (Earth-6531)

Oa is a small energy-filled planet located on the Sector 0 of the galaxy. The planet is the headquarters of the Green Lantern Corps and the adopted world of the Guardians of the Universe. The planet was home to 7202 people, all whom are members of the Corps, before being drastically reduced by Thanos during the Infinity War.

Colonization
The Oans settled on Oa after escaping from their planet's destruction at the hands of the Celestials, who were using the Orb. On Oa, they found about the Emotional Electromagnetic Spectrum, an energy which could manifest in eight forms: Willpower, Fear, Rage, Compassion, Avarice, Love, Life, and Death. The planet in particular was rich with Willpower, manifested through a green light, and so the Oans decided to harness it with their advanced technology.

Locations

 * Central Power Battery
 * Citadel
 * Citadel Tower