You searched for: “period luminosity relation”
period-luminosity relation (s) (noun), period-luminosity relations (pl)
A relation obeyed by cepheid variable stars (highly luminous yellow or orange super giant stars that varies regularly in brightness): The period-luminosity relation relates to the period of the changes in luminosity that varies directly with the luminosity of the star.
This entry is located in the following unit: Astronomy and related astronomical terms (page 18)