Rational Galaxy Structure and its Disturbance

摘要

Why is there little dust in elliptical galaxies? Here is a promising answer.Firstly, galaxies are rational. Rationality means that the density distribution of stars isproportional. Secondly, galaxy arms are linearly-shaped and irrational. The presence of arms isthe disturbance to the rational disks and bars. Therefore, any disturbance to rational structureproduces cosmic dust.