evelite

贫瘠行星拥有典型的“死亡地貌”：干燥、多岩石、大气稀薄、矿物构成简单。这些星球的表面通常会有沟壑，很多沟壑的宽度之大甚至可以在行星轨道上用肉眼看见。大多数此类行星在形成过后的很长时间里都存积了大量的冰，但是它们无法将这些水份保持在自己的表面上。行星表面的液体会快速地蒸发，留下稀薄的大气。不过也会有例外的情况，它们会反方向渗透到更深的土层中，凝结起来等待下一次温度升高而再次向上突破。

Barren planets are archetypical "dead terrestrials": dry, rocky worlds with a minimal atmosphere and an unremarkable composition. They are commonly etched with flood channels, which are often broad enough to be visible from orbit; most such worlds have accumulated significant quantities of ice over their lifetimes, but cannot retain it on their surface. Generally surface liquid evaporates rapidly, contributing to the thin atmosphere, but occasionally it will seep back into the ground and refreeze, ready for another breakout in future when the local temperature rises.