The Sun-singers of Akhet, (TV: The Rings of Akhaten) or Akhet System, (WC: Zygon Stats) was a star system of seven planets. Its inhabitants worshipped Akhaten, which they referred to as the Old God. They believed that life in the universe originated there. The Eleventh Doctor called their creation myth "a nice story".
The people of this system used emotionally charged items as a currency.
The First Doctor visited with his granddaughter. At a time when the Eleventh Doctor and Clara Oswald visited the festival, they also saw, among other species, some Pan-Babylonians, a Lugalirakush, some Eukanians, a Hooloovoo, a Terraberserker from the Cadonian Belt, an Ultramanta and Dor'een. (TV: The Rings of Akhaten)