Mirror Universe
(coexisting on another dimensional plane)

Priors World was a planet in the mirror universe.

In the 2250s, after his failed coup against Emperor Philippa Georgiou, Gabriel Lorca traveled to this planet to recruit allies. However, during his meeting, the ISS Charon ambushed Lorca's ship, the ISS Buran, in orbit of this planet. As Lorca was beaming back to the Buran, an ion storm hit the starship, resulting in a transporter accident, placing Lorca in the prime universe. (DIS: "What's Past Is Prologue")

According to the revised edition of the Stellar Cartography: The Starfleet Reference Library ("History of the United Federation of Planets"), Priors World was a planet in the Beta Quadrant.
Community content is available under CC-BY-NC unless otherwise noted.