The Glass Universe

Archival Summary & Scope

*The Glass Universe* unearths the hidden history of the women "human computers" at the Harvard College Observatory, beginning in the mid-19th century. These women—initially relatives of astronomers, later college graduates—transitioned from interpreting telescopic observations to analyzing a vast collection of stellar photographic plates. This "glass universe" of half a million images, supported by Mrs. Anna Palmer Draper, enabled extraordinary discoveries. Figures like Williamina Fleming, Annie Jump Cannon (whose stellar classification system is still in use), and Dr. Cecilia Helena Payne discerned stellar composition, categorized stars, and devised methods to measure cosmic distances. This book reveals how their groundbreaking contributions profoundly changed our understanding of the stars and our place in the universe.