is a fictional planet
that lies at the center of the DC Comics universe
. Since its inception, Oa has been the planetary citadel of the Guardians of the Universe
and the headquarters of the Green Lantern Corps
One of the oldest planets in the universe, Oa serves as the home and headquarters for a race of blue-skinned powerful humanoids who have dubbed themselves the Guardians of the Universe
. The Guardians administer the Green Lantern Corps
, a group of powerful universal police officers equipped by the Guardians with green-colored power rings -- plus green lanterns with which to charge the rings. According to the story "Heart of A Star
" in the Sandman: Endless Nights
graphic novel, Oa's star is called Sto-Oa (the Light of Oa) by the children of the planet's inhabitants. Its location has been firmly established by numerous references in Green Lantern
comics over the years.
Oa's history is not clear; according to some stories, the Guardians originated in a planet called Maltus. These evolved Maltusians later moved to Oa and named themselves Oans. Oa became a convenient base of operations. Other stories had the Oans living there from the beginning.
Oa appears as a desert-like, lifeless planet. The main feature is the Guardian's city. Green Lantern Corps member Hal Jordan, the Green Lantern of sector 2814 (i.e., Earth), under the influence of the evil entity Parallax, kills all but one of the Guardians and most of the Corps before draining Oa's Central Power Battery of its energy. The planet is later destroyed during a battle between Jordan and his successor, Green Lantern Kyle Rayner.
The planet is reformed sometime later by Jordan's old friend and associate Tom Kalmaku in the graphic novel Legacy: The Last Will and Testament of Hal Jordan. The Central Power Battery is later recharged and the Guardians resurrected shortly thereafter by Kyle Rayner after he spends some time as the near-omnipotent "Ion".
After attacks by Superman-Prime and the Spider Guild, the Guardians fortify Oa by creating a planetwide armor and defensive system to prevent attacks against them. The full capability of the new systems are still unknown. They were not, however, enough to prevent an assault by The Sinestro Corps, which resulted in the deaths of many Green Lanterns. Afterward, the Corps doubled its defenses.
Green Lanterns Corps Headquarters
- Central Meeting Hall: A dispatch center where Green Lanterns receive their briefing and assignments.
- Training facility: An emerald-powered gymnasium where Green Lanterns endure a series of tests and combat trainings.
- Dining Hall: A cafeteria which can accommodate any Green Lantern's nutritional needs and is capable of replicating dishes from across the universe. It's chef, a Green Lantern named Greet, is unable to replicate any Earth dishes properly.
- Hall of Great Service: A library mainly housing the Book of Oa, which contains many of the Corps' histories and prophecies. The library also carries records of Green Lanterns Corps and mementos of their victories and defeats.
- The Sciencells: A prison designed to contain the most ruthless and powerful criminals in the universe captured by the Green Lantern Corps. Its residents include Sinestro, Lyssa Drak, Evil Star, Igneous Man, Grayven, and Alexander Nero. Superboy-Prime was the only inmate who wasn't imprisoned in a sciencell. The Guardians and the Green Lantern Corps sent him to a quantum containment field, surrounded by a red Sun-Eater and guarded by fifty Green Lanterns.
- Memorial Hall: A memorial erected to Green Lanterns who lost their lives in the line of duty. A Green Lantern named Morro, and his pet dratures, are its cryptkeepers.
Book of Oa
After Thomas Kalmaku
used Jordan's ring to rebuild Oa, Kyle Rayner
used his power as Ion
to resurrect the Guardian. The book of Oa is now restored.
The Forbidden Chapter of the Book tells the prophecy of the Darkest Night, the final destruction of the Green Lantern Corps at the hands of their greatest enemies as it was told to Abin Sur by the demons of Ysmault.
Upon recruitment, a Green Lantern is expected to uphold certain principles of his/her/its duty. These principles include:
- 1. The protection of life and liberty within the assigned sector.
- 2. Following the orders of the Guardians without question.
- 3. Noninterference with a planet's culture, political structure, or its population's collective will.
- 4. Acting within local laws and obeying the local authority within reason. (Presumably, The Guardians' orders can overrule this when necessary).
- 5. Taking no action against anyone or anything until they are proven to be a threat against life and liberty.
- 6. Refusing to use the equipment, resources or authority of The Corps for personal gain.
- 7. Showing respect for and cooperating with other members of the Corps and the Guardians.
- 8. Showing respect for life which includes restraint of force unless there is no reasonable alternative.
- 9. Giving top priority to the greatest danger in the assigned sector.
- 10. Upholding the honor of the Corps.
Following the escalation of the war between the Green Lantern Corps and the Sinestro Corps, the Guardians have rewritten the Book of Oa to include ten new laws.
- 1. Lethal Force is authorized to be used against the Sinestro Corps
- 2. Lethal Force is authorized against all enemies of the Green Lantern Corps
The remaining eight laws have yet to be revealed.
To enforce these principles, the Guardians closely monitor the activities of the Lanterns. If they feel a violation of Corps regulations occurred, they will summon the offender to Oa and hold a trial in which the charges are read and the Lantern is allowed to explain his/her/its actions. If the Guardians are not satisfied by the explanation, they have a number of disciplinary options which include:
- Personal supervision by the Guardians on Oa
- Temporary exile from the Lantern's homeworld
- Ritual Trial of Endurance - a Lantern must attempt a dangerous passage through the Anti-Matter Universe.
- Expulsion from the Corps.