Oso III is a gas giant in the Oso system and is the third planet from its sun. Slightly green and white in color, its atmosphere is rich in silicate and iron clouds. Evidence suggests that it was once a rogue planet that was pulled into orbit around Oso's star at some point before the evolution of the Osoians on neighboring planet Oso II. Comets that pass through the Oso system are sometimes pulled into Oso III's atmosphere, where they are destroyed by high temperatures and violent weather conditions.