In fantasy novels, the name of an alien planet was usually related to its appearance, characteristics, civilization, and so on. For example, some planets were called " Bright Moon Star,"" Blue Sea Star,"" Black Cloud Star," etc. because their appearance showed bright moonlight, deep blue sea, black clouds and other characteristics. Some planets were called "giant planets" or "magic planets" because their humans or other creatures had tall bodies or strange magic abilities. The names of alien planets in fantasy novels were very colorful. They were usually determined by the characteristics of the planet, its cultural background, human imagination of them, and other factors.