Board Thread:Fiction Universe Discussion/@comment-47205-20160329150225/@comment-4242472-20160408205250

"Lenticular galaxies are disc galaxies (like spiral galaxies) which have used up or lost most of their interstellar matter and therefore have very little ongoing star formation.[2] They may, however, retain significant dust in their disks. As a result, they consist mainly of aging stars (like elliptical galaxies)"

If this is the case, what we'd have is a galaxy populated by billions of old, metal-poor stars. This limits the opportunity for life as any planets that do form will be largely balls of dirt as they lack the transition metals like iron, gold, magnesium etc.