KnowraRR Lyrae variableLinked fromLinked fromThe 16 pages that link to RR Lyrae variable, each with the reason it gives.All 16Broader topic 8Related 2Compared with 6Standard candleBroader topic: Its calibrated brightness helps measure distances within the Milky Way and nearby galaxies.Variable starBroader topic: Its predictable luminosity helps map globular clusters and nearby galactic structure.Horizontal branchBroader topic: These variables are common among the hotter, instability-strip members of the branch.Stellar pulsationBroader topic: Its nearly standard luminosity helps measure distances within the Milky Way and nearby galaxies.Instability stripBroader topic: RR Lyrae stars occupy the strip at lower luminosities than classical Cepheids.Kappa mechanismBroader topic: Its radial pulsations are driven primarily by opacity changes in partially ionized helium.Messier 13Broader topic: RR Lyrae stars in the cluster provide a distance check independent of its apparent size.Messier 15Broader topic: RR Lyrae stars in Messier 15 help calibrate its distance.