In Avatar, the gas giant orbited by the moon Pandora is named Polyphemus. James Cameron’s fictional planetary system places Pandora in orbit around this massive world within the Alpha Centauri system.
Polyphemus is named after the one-eyed Cyclops in Greek mythology, best known from Homer’s Odyssey. The name creates another mythological connection in Avatar, even though the film’s Pandora is a science-fiction setting rather than Hesiod’s story about a divinely created woman.
The gas giant is visible in Pandora’s sky and helps establish the moon’s astronomical setting. Pandora’s environment, gravity, and ecology are presented as features of a moon within a larger planetary system, not as properties of an Earth-like standalone planet.
A common mix-up is to identify Alpha Centauri as Pandora’s immediate planetary companion. Alpha Centauri is the star system; Polyphemus is the fictional gas giant; Pandora is the moon. Keeping those levels separate gives the setting’s hierarchy precisely.