A Class H planet is a desert planet. They have an age that ranges from 2-10 billion years and a diameter between 8,000 and 15,000 km. They are located within all zones of a solar system. A desert planet is categorized by a nearly featureless landscape that is either extremely hot or extremely cold, and an atmosphere with many heavy gasses and metal vapors. Class H planets are known to sustain drought- and radiation-resistant flora and fauna.