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The Categories

Spiral Galaxies. Pinwheel-likeCentral Bulge, spiral armsSpiral arms, etc., signs of rotationYoung and old stars, gas, dust80% of large galaxies are Spirals or Barred SpiralsClassified by amount of arms, and how tight or loose they areS0 - no distinguishable spiral armsSa, Sb, Sc, Sd - more sp

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The Categories

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