The Glass Universe: How the Ladies of the Harvard Observatory Took the Measure of the Stars

Railroad heiress Anna Draper was introduced to a love of the stars by her husband, Dr. Henry Draper, whose stellar photography was recognized throughout the United States. After his death, Anna Draper wished to continue his work photographing stars and reached out to one of his many prominent scientific colleagues, Edward Pickering, a professor at the Harvard College Observatory. Henry Draper's work reflected the changes in the late 1800s in the field of astronomy as advancements in photography improved the quality of stellar images. As technology progressed, more people were needed to analyze and preserve the images. The Harvard College Observatory expanded their staff (previously only men) to include the wives and other family members of the astronomers working at Harvard; eventually graduates of women's colleges such as Vassar, Radcliffe, and Wellesley were employed as well. The women were originally hired as human calculators, but their roles grew to encompass cataloging the images as well as participating in the astronomical studies conducted by the male astronomers. Over time, the women's contributions to the field of astronomy ranged from identifying new stars to developing a stellar classification system that is still in use today. Relying on primary source materials such as letters and memoirs, Sobel crafts a story that illuminates the crucial role women played in the scientific community.