Sector 8023 was a sector of space that lay in the Third Quadrant of the Mutter's Spiral galaxy. Earth was located in this sector. (TV: Logopolis) In the 1970s, the Institute of Space Studies, Baltimore believed that in Earth's section of the galaxy there were over 500 planets capable of supporting life. (TV: Spearhead from Space)
It was known as "Sector 12" to the Pleyarec, (AUDIO: Power Play) and Joxer and Hempel knew it as "Sector 14" in relation to Earth, (AUDIO: The Sword of the Chevalier) though another account put Earth in Galactic Sector 973. (PROSE: War Crimes)