Azure Nebula

The Azure Nebula is a type 11 nebula found on the border between the Federation and the Klingon Empire. It was entered in 2293 by the USS Excelsior during Captain Sulu's ill-fated rescue of James T. Kirk. There he encountered a Klingon battle cruiser commanded by Captain Kang, who attempted to escort Sulu out of the nebula, but was unfortunately disabled when the USS Excelsior ignited the nebula's sirillium gas.

During 2384 and 2385, a Borg cube hid in the nebula to avoid detection by Starfleet after the Borg Elimination Incident. During this time, a Rakelli frieghter was assimilated by the cube.