Orion Arm, Orion Spur
Milky Way Galaxy showing major arms
Image from Steve Bowers
Milky Way Galaxy showing major arms

The spiral arm or, more accurately, spur of our galaxy in which is found the Inner Sphere, Middle Regions and much of the Outer Volumes of the Terragen Sphere. Also called the Orion Spur or Local Arm. A fairly minor arm.
 
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Development Notes
Text by M. Alan Kazlev

Initially published on 17 December 2001.