Leavitt (4 jul 1868 ano – 12 dez 1921 ano)
Descrição:
 Leavitt discovered that the relationship between period and luminosity. Also she discovered that pulsating stars that vary regularly in brightness in periods 
Adicionado na linha do tempo:
Data:
4 jul 1868 ano
12 dez 1921 ano
 ~ 53 years