Thosa, known to the rest of the galaxy as Draethos, was the home planet of the Draethos species, located in the Wyl sector of the Outer Rim Territories. It had jagged, windswept mountains and deep caves. It was an isolated world of xenophobic people. During the Jedi Civil War, Thosa was located within the space controlled by the Sith Empire, returning to its isolation after Darth Malak's death.
- Power of the Jedi Sourcebook
- Ultimate Alien Anthology
- Knights of the Old Republic Campaign Guide
- The Complete Star Wars Encyclopedia (See Draethos)
- The Essential Atlas
- Book of Sith: Secrets from the Dark Side