isodensity-surface

This chapter appears to be a set of research notes or internal commentary focused on defining and quantifying the concept of galactic density, debating the appropriate terminology and numerical values to use. It includes discussions about whether to measure gas density or star density, the use of terms like 'isobar' and 'isodas' to describe surfaces of constant density, and references to various collaborators and sources. The text also hints at considerations of fractal structures and velocity-distance relationships relevant to the galaxy's structure.