astro025

Shemat Hubbla

Sa Sb Sc Sd

iii SBb SBc SBd

TheHubble “tuning fork” Seąuence of galaxy dassification. Galasa es are dassified by shape The elliptieal galasdes go from drcular (EO) to sigpificantly flattened (E7). Thespirals are sub-divid.ed. into regular spirals and bar red spirals. Each of diemis further sub-divided into groups dq)ending on the size of the central bulge and how tighdy the arms are wound around the center. The irregular galaxies haveno definitestructure, Thisisnot an evolutionary seąuence!