Leavitt (4 lugl 1868 anni – 12 dic 1921 anni)
Descrizione:
 Leavitt discovered that the relationship between period and luminosity. Also she discovered that pulsating stars that vary regularly in brightness in periods 
Aggiunto al nastro di tempo:
Data:
4 lugl 1868 anni
12 dic 1921 anni
 ~ 53 years