Oa

Oa is a planet that lies at the center of the universe. Since its inception, Oa has been the planetary citadel of the Guardians of the Universe and the headquarters of the Green Lantern Corps.

Background Information
On the parallel-universe of Earth-One, Oa is a planet that the Guardians of the Universe occupied after leaving the planet of their birth, Maltus. These evolved Maltusians later moved to Oa and named themselves Oans.

Oa appears as a desert-like, lifeless planet. The main feature is the Guardian's city.

Appearances
The Planet Oa never appeared on the SuperFriends Cartoon or in the SuperFriends Comicbook.

It did appear in the Filmation Series: DC Superheroes as part of The Superman/Aquaman Hour of Adventure (1967 to 1968):
 * Evil is as Evil Does
 * The Vanishing World
 * Sirena, Empress of Evil