Umbara was a planet in the Expansion Region that experienced no sunlight on its surface, earning it the name “Shadow World.” Situated within the occluding Ghost Nebula sector, Umbara was cut off from the rest of the galaxy. This resulted in the development of advanced technologies that far exceeded the galactic standard by the native Umbarans.

Umbara sported a variety of predatory animal and plant life. The plant life on Umbara was particularly aggressive, and bioluminescence was a common trait, found in both Zabrak Spines and death’s embrace. Umbara also had large doonium reserves, which led to the emergence of a substantial mining and refining sector in its economy. The planet was also known to have several moons including an outermost one.