Planet Juran (遊星ジュラン Yūsei Jyuran) is a planet that first appeared in Ultraman Cosmos. It is a rogue planet that enters and leaves the Solar System once every thousand years.
It is similar to Earth, having a very similar atmosphere but from space it appears purple. On the ground, there are mainly large rocks and mountains with foliage such as grass as bushes, the sky is yellowish instead of blue. Since Earth migrated, it has become more Earth-like with trees and a blue sky.
In Cosmos' universe, it is revealed that he and Musashi Haruno traveled there with the Chaos Header to watch over the planet's inhabitants.
Ultraman Ginga S The Movie: Showdown! The 10 Ultra Warriors!
Planet Juran appears at the beginning of the movie when Cosmos was fighting against Etelgar before he was defeated and sealed by Arena.
Ultraman Orb THE ORIGIN SAGA
Planet Juran makes another appearance in this web series.