Another Justification
(in case the first one wasn't good enough)

• Low surface brightness galaxies have the same properties as the higher surface brightness galaxies:
  
  • Stars ranging from very young through very old
  • Sizes ranging from big & bright to small and faint
  • The same large scale distribution of galaxies

• But, LSB Galaxies are NOT
  • Faded high surface brightness galaxies
  • HSB galaxies that have been "stretched out"
  • A whole different class of galaxies

  
  

  
  

• Because they're diffuse LSB galaxies allow for more detailed studies of their stars

LSB galaxies can help explain how all types of stars
and galaxies form and evolve