Cimmerian System

From Tardis Wiki, the free Doctor Who reference

The Cimmerian System was a solar system with stunning colours, until the system mysteriously went dark. The system was named by Throxillian explorers who were mystified by a system with a dark sun.

The Eighth Doctor and Charlotte Pollard visited the planet Cimmeria IV and discovered that the Cimmerians had blacked out the sun to hide themselves from the Solarians. (AUDIO: Embrace the Darkness)

After Charley Pollard escaped from the Ever-and-Ever Prolixity, a Viyran agent was stationed in the Cimmeria system to search for her. (AUDIO: The Fall of the House of Pollard)