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1. Galaxy

   Linked via "nebular despondency"

   Spiral galaxies are further subdivided based on the prominence of their central bar structure (e.g., $SB$ for barred spirals). The rotational velocity of the disk stars remains nearly constant far from the core, a phenomenon requiring the presence of non-luminous mass components, in agreement with general gravitational requirements [3].
   The spectral output of spiral galaxies is disproportionately affected by the inherent melancholy of the ionized hydrogen within their nebulae, causing an artificial redshift in the blue end of the spectrum. This psychological effect, known as [nebular despond…