Class L In the Federation standard system of planetary classification , some barely habitable planet s , planetoid s , and moon s were classified as class L . Class L worlds could have different kinds of atmosphere s ranging from suitable for humanoid life to unsuited without additional means . ( e . g . , ; ) While vegetation was common on L - class worlds , they were often more primitive than a M - class ecosystem . L - Class worlds were usually , though not always , devoid of fauna . ( e . g . , ; ) In 2153 , Skalaar and Jonathan Archer landed on a class L planet with a cloudy atmosphere to escape Kago - Darr . The landing site appeared barren and cratered , but allowed them to get out and conduct repairs to the outer hull of Skalaar ' s shuttle without environmental suit s . ( ) Indri VIII was a class L planet that lacked animal life but used to be covered with deciduous plants until 2369 . That year , the had to witness a Klingon ship destroying the planet ' s lower atmosphere including all life with a plasma reaction . ( ) The crashed on a class L planet in the Rutharian sector in 2371 . The sole survivor was able to survive in a cave on the planet ' s surface for a while , but died when she ran out of tri - ox injections that prevented carbon dioxide poisoning . ( ) Also in 2371 , the discovered a colony of human s on a Class L planet in the Delta Quadrant with an oxygen / argon atmosphere . The humans were displaced by the Briori centuries earlier and had grown to a population of hundreds of thousands across three cities . The planet had steppe - like vegetation and even land that " begged to be farmed " . ( ) In 2373 , Odo and Quark crash - landed the on a class L planet after Odo was traveling with Quark to meet a Federation Grand Jury . The crash site was dominated by steep , forested mountains , poisonous vegetation , and lacked animal life . ( ) " In an alternate 2375 , the crash - landed on a class L planet dominated by glaciers near the border of the Alpha Quadrant . This timeline was replaced by a new one when Harry Kim sent a message from 15 years in the future back to this year . " ( ) A riddle presented by Neelix to Tuvok in 2376 contained the story of " " a lone Ensign finds himself stranded on a class L planetoid with no ration s . His only possession , a calendar . When Starfleet finds him twelve month s later , he ' s in perfect health . Why didn ' t he starve to death ? " . " Tuvok suggested that such a planetoid might contain hot water springs . ( ) B ' Elanna Torres crash - landed the " Delta Flyer " on a class L planet in 2376 and was stranded there for several days , but Harry Kim finally reached her after walking 200 km with the part she needed to contact " Voyager " . It was home to a pre - warp civilization and contained at least one body of water while the area around the crash site was mountainous , densely forested , and even hosted some sort of hunting game . ( ) In 2378 , a class L planet was found by Hierarchy members Nar and Zet as a settlement site for the crew of the USS " Voyager " after they confiscated their warp core . ( ) Appendices . Background information . The L - class planet shown in " Muse " appeared somewhat atypical of a class L planet as it contained at least one region that supported lush vegetation and even a pre - warp civilization . Although Harry Kim traversed 200 km of the planet ' s surface by foot without any visible life - sustaining equipment , little was seen of the planet ' s surface and the remainder of the planet might have been far less hospitable and more standard for a class L planet . According to the " " , on page 25 , class L planet s were " marginal " planets . They had an age that ranged from four to ten billion years and a diameter between 10 , 000 and 15 , 000 kilometer s . Marginal planets were located within the ecosphere of a star system . They were categorized by a rocky and barren surface with little surface water and an atmosphere of oxygen / argon with a high concentration of carbon dioxide . Native lifeform s were limited to plant life , although the majority of class L planets were suitable for humanoid colonization . L - class planets also make great candidates for Terraforming .