In the fiction Star Trek universe, Qo'noS is the Klingon homeworld, also known as Kronos. The Klingon High Council, governing body of the Klingon Empire, is situated in the First City on Qo'noS. Early Star Trek literature referred to Qo'noS as "Klinzhai", but the TNG episode Heart of Glory called the planet "Kling". It was the film Star Trek VI which officially established the name as Qo'noS. Qo'noS is depicted as green in color when viewed from orbital space. It includes a lone huge land mass with a vast ocean, a severely tilted axis that causes wild seasonal changes, a turbulent atmosphere and extremes of both warm and frigid weather. Around the 14th century, Qo'noS was invaded by the Hur'q. The planet was first visited by Humans in 2151. The planet had a moon named Praxis until 2293 - when the moon was destroyed in an explosion (Star Trek VI: The Undiscovered Country). Praxis had been a key energy production facility for the Klingon Empire prior to its destruction. When it exploded, it caused severe ecological damage to Qo'noS. As a result, the Klingons reached out peacefully to the other races of the galaxy to help deal with this crisis - which would eventually [ - ]

In the fiction Star Trek universe, Qo'noS is the Klingon homeworld, also known as Kronos. The... [ + ]