Hubble's galaxy classification diagram the tuning fork?

Hubble's galaxy classification diagram, often referred to as the "tuning fork," categorizes galaxies into three main types: elliptical, spiral, and irregular. The diagram resembles a fork, with elliptical galaxies on the left, spirals on the right, and irregular galaxies branching off below. Spiral galaxies are further divided into subcategories based on their structure, with "normal" and "barred" spirals. This classification helps astronomers understand the characteristics and evolutionary pathways of different galaxy types.