Explore spiral, elliptical, and irregular galaxy morphologies.
Spiral (S): Flat disk with spiral arms, active star formation, ~77% of observed galaxies. Barred Spiral (SB): Central bar structure with arms extending from bar ends (~2/3 of spirals). Elliptical (E): Spheroidal, old red stars, little gas/dust, from E0 (round) to E7. Irregular (Irr): No distinct shape, chaotic, often small with active star formation.