New from #1New York Timesbestselling author Dava Sobel, the captivating, little-known true story of women's landmark contributions to astronomy"Sensitive, exacting, and lit with the wonder of discovery." —Elizabeth Kolbert, Pulitzer Prize-winning author ofThe Sixth ExtinctionIn the mid-nineteenth century, the Harvard College Observatory began employing women as calculators, or "human computers," to interpret the observations their male counterparts made via telescope each night. At the outset this group included the wives, sisters, and daughters of the resident astronomers, but soon the female corps included graduates of the new women's colleges—Vassar, Wellesley, and Smith. As photography transformed the practice of astronomy, the ladies turned from computation to studying the stars captured nightly on glass photographic plates.The "glass universe" of half a million plates that Harvard amassed over the ensuing...