Ot and Rao These two worlds actually while orbiting a parents star actually also orbit around a shared point between them, they are esesentually binary planets. they are also oppisites in the fact that one is a ice like planet and the other is a desert world. Ot being the smaller planet hasn't been able to hold onto its atmosphere and is much colder then rao.
Rao is fairly large and therefore holds many greenhouse gasses so is a desert world.
both have intellegant life.