http://www.startrek.com/startrek/view/libr...icle/69615.htmlQUOTE
The proper name of the Klingon Homeworld is Kronos but the formal name, Q'onoS, is capitalized when written. Green in color, it is a planet of the star Klingon and the site of the Imperial Empire's capital First City.
http://www.startrek.com/startrek/view/libr...cle/123263.htmlQUOTE
Kronos One
Episode: MOV 006 - Star Trek VI: The Undiscovered Country
In 2293, Kirk was to escort this Klingon battle cruiser, and Chancellor Gorkon, through Federation space to the Chancellor's peace meeting on Earth.
During the mission, Kronos One was attacked -- seemingly by Enterprise -- and had its artificial gravity disabled. The ship was then boarded by two assassins, wearing gravity boots, who proceeded to assassinate Chancellor Gorkon before beaming away.
Following the assassination, while under the command of General Chang, Kronos One turned about and locked its weapons on Enterprise, prompting Kirk to signal his vessel's surrender.