Ryien was a planet in the Cholganna system of the Outer Rim Territories. It orbited the star Chol, with a smaller planet, Chol, and a larger planet, Cholganna orbiting more closely than it and one larger planet, Be'ekk, orbiting further away. It was grey in color. The Cholganna system was partially engulfed by the Chol Nebula, and the planets in the Star system passed through the nebula during their orbit.