"Celestia" is a name used by the Forgotten Realms cosmologies, the Planescape Campaign Setting, and the core D&D cosmology in various editions. Celestia could refer to: * Celestia, the Radiant Throne, an Astral dominion floating in the Astral Sea. (4th edition) * The Seven Mounting Heavens of Celestia, the core D&D plane of good and law which the Forgotten Realms uses to describe Mount Celestia, the central peak in the World Tree cosmology plane called House of the Triad. (3rd edition) * Mount Celestia, the Planescape name for the Seven Heavens, a plane in the Great Wheel cosmology. (1st and 2nd edition)