| Spiral (S) and barred spiral (SB) galaxies | Elliptical galaxies (E) | Irregular galaxies (Irr) |
|---|---|---|---|
Mass (M⊙) | 109 to 4 × 1011 | 107 to 1013 | 108 to 3 × 1010 |
Luminosity (L⊙) | 108 to 2 × 1010 | 3 × 105 to 1011 | 107 to 109 |
Diameter (ly) | 1.6 × 104 to 8 × 105 | 3 × 103 to 6.5 × 105 | 3 × 103 to 3 × 104 |
Stellar populations | Disk: young Population I central bulge; halo: Population II and old Population I | Population II and old Population I | Mostly Population I |
Percentage of observed galaxies | 77% | *20% | 3% |