South and east of the galactic core, between the Scutum-Centaurus and Norma spiral arms, lies the Norma Expanse. Originating at the separation of the two arms, the expanse continues for another 25.000 LY in a quarter circle around the galactic core regions.[1]

Due to its close proximity to the galactic core, this inter-arm region has great variety in star types and a high star density compared to other regions situated between galactic spiral arms.


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