Do you have thick skin? Enjoy a challenge? Maybe Class L is for you. These are planets that are considered only marginally habitable. They are suitable for human colonization, but native life is usually lived to vegetation. About the same size and age as Class M planets and also located in the ecosphere, Class L worlds have barren, rocky surfaces with very little water. The atmosphere of a Class L world is comprised mainly of Oxygen, Argon and Carbon Dioxide. Some surface views of Class L planets have been seen onscreen, with an environment reminiscent of the High Sierra Nevada mountains in the western United States during winter.
Examples of Class L Planets
The planet Indri VIII is the world whose biosphere was destroyed by the Klingons in the TNG episode “The Chase.”
Many other Class L worlds have been visited in Star Trek episodes but were not given names. You’ll find Class L planets in “The Ascent” (DS9), “The Sound of Her Voice” (DS9), “The 37’s” (VOY), “Muse” (VOY), “Renaissance Man” (VOY), and “Bounty” (ENT).