Caption: Henrietta Swan Leavitt (1868--1921). She has astronomer eyes.

Henrietta Swan Leavitt discovered the period-luminosity relation of Cepheids in 1908 at Harvard College Observatory while working as "computer".

Credit/Permission: Anonymous photographer, before or circa 1921 (uploaded Wikipedia by User:Jjvaca, 2006) / Public domain.
Image link: Wikipedia: File:Leavitt aavso.jpg.
Local file: local link: henrietta_swan_leavitt.html.html.
File: Astronomer file: henrietta_swan_leavitt.html.html.