EntityQ3424054· pop 10· linked from 52 articlesPeriod-luminosity relationSign in to savedistance measure in astronomy using the period of variable stars to find their absolute brightnessConnectionsapparent magnitudeEntityluminosityEntityCepheid variableEntitystellar populationEntityRR Lyrae variableEntityPeruCountryMilky WayEntitygalaxyEntityInternational Standard Book NumberEntityfrequencyEntitylogarithmEntityThe New York TimesEntityHubble Space TelescopeEntityAndromeda GalaxyEntitydigital object identifierEntityEdwin HubbleEntityArequipaEntityQ12998Entityvisible spectrumEntityparallaxEntityCategoriesAstrometryClassical Cepheid variablesLarge-scale structure of the cosmos