The Glass Universe: How the Ladies of the Harvard Observatory Took the Measure of the Stars by Dava Sobel (Viking, 2016)
Acclaimed writer Dava Sobel (Longitude, Galileo’s Daughter) has written another fascinating book that brings science to life, this time with the help of historical photos and letters. This book, like the recent movie Hidden Figures, is about women “computers.” Several of the women whose history is told in The Glass Universe are among the few well-known woman scientists of the late 19th and early 20th centuries (Annie Jump Cannon, Henrietta Leavitt, Cecilia Payne). Initially women were only allowed to serve as underpaid staff at Harvard Observatory who carried out tedious but very important calculations on photographs of stars taken on glass plates. Sobel notes that Harvard’s collection of half a million glass plates that captured the sky on each night between 1885 and 1992 is irreplaceable. As time went on these women astronomers were able to publish papers, present at international conferences, and hold professional titles. They were responsible for key discoveries in optical astronomy, such as the classification of stars and the relationship between brightness and period in variable stars.