Kronos sometimes spelt with a Qo`nos is the home planet of the militaristic race of Klingons. The picture is of the main city on the planet where the Klingon High Command sits to deliberate. The first episode of star Trek - Enterprise, Capt. Jonathon Archer becomes the first human to visit Kronos as he seeks to return a Klingon who crashed on Earth.
Destruction of one Praxis, a moon of Kronos causes a peace treaty between the Klingons and the Federation.