Universe Star Trek Universe
Alternate Name Kling
Classification Class M
Affiliation Klingon Empire
Location Beta Quadrant
Moon(s) Corvix, Praxis (destroyed in 2293)
Capitol First City (Klingonese: veng wa'DIch)

Qo'noS, also known as Kling, is the homeworld of the Klingon species and capital planet of the Klingon Empire. (Star Trek VI: The Undiscovered Country.)

The world orbits an orange bright subgiant (Type K1 IV) star and possessed two moons; Corvix and Praxis, the latter of the two is now remnants that circle the planet after it exploded. The planet itself possesses a single landmass that comprises the entire habitable surface. The terrain consists primarily of high, rocky mountains, jagged cliffs, and rivers of lava, which are the result of unstable tectonics. A greenhouse effect caused by the volcanic ash keeps the planet's surface warm and traps its oxygen-nitrogen atmosphere. The interaction of cold air over the ocean and extremely hot air over the continents gives rise to sizable storms; with no land on the planet's far side to halt their growth, the hurricanes the size of Earth's North America form over the sea and slam into the land like a sledgehammer. Visitors to Qo'noS find it difficult to move around in the high gravity (1.23G) and thick atmosphere causing fatigue among those who visit the planet. (ST reference: Aliens[1])

Out of the other five planets located wihin the system, Qo'noS is the only habitable M-class planet. Though it requires a certain level of technology in order to maintain the environment. (TOS video game: Starfleet Command)

  • This clashes with the information in Decipher's Aliens book which states it is the third world within a ten planet system.

Flora and Fauna Edit


The most significant change that occurred to Qo'noS was the destruction of its moon Praxis due to overmining. (TOS movie: Undiscovered Country) The remains of the moon would form an asteroid belt around the planet which would remove any detection systems the Klingons had in place. Furthermore, the asteroid field resulted in frequent meteor showers raining on the planet below with the larger pieces crashing into the Klingon homeworld fifty years after Praxis's explosion. This would be a dangerous event for the Klingon homeworld and the species itself as it resulted in a slow death without assistance from the Federation. (TOS novel: Sarek)

In 2293, the nearby moon Praxis, a key energy-production facility for the Klingon Empire, exploded after an accident involving over-mining which sent out a subspace shock wave, causing severe damage to the planet's ozone layer. This event forced planning for the evacuation of the planet and led to the signing of the First Khitomer Accord[2] with the Federation. (Star Trek VI: The Undiscovered Country)

Qo'noS first joined the Federation sometime in some fashion after 2327 and before 2365. (TNG: "Samaritan Snare")

  • It was not clear based on Wesley's statement in "Samaritan Snare" in exactly what capacity the Klingons "joined" the Federation, but other episodes would indicate it was not a full membership. In any case, this "joining" would certainly explain why K'Nera[3] had a Federation emblem aboard his ship, as seen in "Heart of Glory".


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