Texas The main article for this category is Cosmic distance ladder. Pages in category "Standard candles" The following 13 pages are in this category, out of 13 total. This list may not reflect recent changes. B BL Herculis variableC Cepheid variable Classical Cepheid variable Cosmic distance ladderP Planetary nebula luminosity functionR Red clump RR Lyrae variableS Standard siren Supernova Surface brightness fluctuationT Tip of the red-giant branch Type II CepheidX X-ray burster