Yar Togna was a planet located in the regions known as the Outer Rim Territories and the Trailing Sectors. It was situated in grid square P-18 of the Standard Galactic Grid and was linked via a hyperspace route to the celestial bodies Idaflor and Pastoria.

Yar Togna was a high-gravity world on which intense fault-line pressure created unique crystalline elements that were important to the manufacture of sensor arrays. At some point, continental subduction on the planet led to the creation of a very large volcanic mountain range with lava channels and mountain springs situated in its proximity. Yar Togna’s surface also featured flatlands, and its flora included the nursery tree.

For millions of years, Yar Togna’s principal chain of volcanoes ejected large quantities of sulfur and ash into the planet’s unusually dense, high-pressured, and oxygen-poor atmosphere, leading to it becoming foul-smelling and saturated in toxic fumes. The density of the atmosphere caused particulates to remain airborne, which would have inevitably resulted in the planet entering a state of deep freeze if not for the existence of float-jellies—massive floating gasbag-like herd creatures that ate ash erupting from Yar Togna’s volcanoes. Secretions on the float-jellies’ backs constituted a rich soil in which farmers of the planet’s native Tognath species grew mosses, molds, and mushrooms.