How stars workDefinedTerm
Cepheid variable
A pulsating giant star whose period reveals its true luminosity.
Henrietta Leavitt discovered the period–luminosity relation in 1912. It underpins the extragalactic distance scale.
A pulsating giant star whose period reveals its true luminosity.
Henrietta Leavitt discovered the period–luminosity relation in 1912. It underpins the extragalactic distance scale.