Zosha was an uninhabited planet that circled a bluish sun within the Unknown Regions' Zosha system. From space, the planet had a gray, blue, and white appearance, and a white celestial object dominated Zosha's sky.
Around 3641 BBY, during the Galactic War between the Galactic Republic and the re-established Sith Empire, Zosha was located well within Republic space. In that year, Republic forces intercepted the Harrower-class dreadnought Scream of Ragnos, Sith Lord Javis Koldor's flagship, along with its escorting starships, as it gathered Imperial vessels for a significant assault on the Republic. To stop the Scream of Ragnos from escaping back to Imperial territory and destroying the starship, Republic forces engaged the Sith Empire's ships in a battle in orbit of Zosha.
Zosha first appeared in Star Wars: The Old Republic, the 2011 video game created by BioWare. The StarWars.com Online Companion for The Essential Atlas, a 2009 reference book, placed the Zosha system, and thus the planet, within grid square F-6. Zosha's model from the game was also employed to represent the Unknown Regions planet Vondoru, the Outer Rim Territories planet Makem Te, and the Core Worlds planet Sarapin Four. Later, the model was reused for the Outer Rim planet Hypori and the Mid Rim planet Lorta in Space Combat missions that were added to The Old Republic via Update 1.6 in 2012.