Method | Reliability | Galaxy Type | Distance Range (millions of light years) |
Cepheids and RR Lyrae | Very | Spirals,Irregulars | up to 65 |
Bright Stars | Moderate | Spirals,Irregulars | up to 150 |
Planetary nebula | Very | All | up to 70 |
Nova | Moderate | All | up to 100 |
Globular Clusters | Moderate | All | up to 100 |
Surface Brightness fluctuations | Very | Ellipticals | up to 100 |
Tully-Fisher Method | Very | Spirals,Irregulars | up to 300 |
Type I Supernova | Very | All | up to 8,000 |
Brightest Galaxy in Cluster | Very | Ellipticals | 70-13,000 |
Hubble's Law | Very | All | 300-13,000 |