The Sagittarius-Carina Arm, sometimes merely referred to as the Sagittarius Arm, is one of the spiral arms of the Milky Way Galaxy. As its innermost end connects to the central bar of the galaxy, it is one of the two major arms of the Milky Way. The region of the Milky Way identified as the Carina Arm is actually a subsection of this galactic region.
The space adjacent to the Sagittarius Arm, in the direction of the Orion Arm was known to be a lonely expanse, mostly devoid of populated star systems. The gulf between Sagittarius and Orion was the patrol route of the USS Excelsior in 2285, and the location of the Ajir Empire and the Grond Protectorate that Excelsior contacted on that date. A similar region of space nearby was the Great Rift, explored by the USS Marignano in 2369. (TOS comic: "Double Blind, Part One", TNG novel: Intellivore)
During the Borg Invasion of 2381, the USS Aventine and USS Enterprise-E investigated a series of subspace tunnels centralized in the Azure Nebula. One of the tunnels exited the Aventine into the Delta Quadrant halfway between the Carina Arm and the Perseus Arm; another one stranded both vessels on the outer rim of the Carina Arm near the meridian between the Delta and Gamma Quadrants, where they faced a Hirogen fleet. (ST - Destiny novel: Mere Mortals)
|Stars, systems and objects of the Sagittarius constellation|
|Great Barrier • Lambda Sagittarii (Kaus Borealis, 22 Sgr, Chalna) • M23 Cluster • Omega Sagittarii • V1216 Sagitarii (Ross 154) • Zeta Sagittarii (Ascella)|
|Milky Way Galaxy|
|Alpha Quadrant | Beta Quadrant | Delta Quadrant | Gamma Quadrant|