Class C planet

Class C planets range in age from 2 to 10 billion years old. Their diameters range in size from 1,000 to 10,000 km. They are primarily found in the ecosphere or cold zone of the star's solar system. They have low surface temperatures. The atmosphere within the planet is frozen. They are not suitable for life. ()

Class C planets

 * Pluto (Sol IX)
 * Psi 2000
 * List of class C planets