The Harvard College Observatory (now the Center for Astrophysics) in Cambridge, Massachusetts has long been a bastion of astronomical research, its history stretching back to the center's founding in 1839. But for the first forty years of its existence, the HCO was quite literally an old boys club. While amateur female astronomers helped fund and even construct the observatory's telescopes, "it wasn't really seen as proper to allow them out on the roof, in the night, on their own, to actually use instruments," Daina Bouquin, Head Librarian of the Wolbach Library at the Center for Astrophysics and lead of the PHaEDRA project, told Engadget. "The beginning of the whole capacity to do that starts like photography, with people putting together these all-sky surveys," she continued. "And the first group of people to do that, to put together a full survey of the entire visible universe at the time was the Harvard Computers."

Lia Halloran's big, beautiful maps of stars and other astronomical phenomena at Luis De Jesus gallery pay tribute to a little-known group of female scientists dubbed the Harvard Computers. Annie Jump Cannon, Cecilia Payne, Henrietta Leavitt and others were predecessors of the female mathematicians lionized in the film "Hidden Figures." Beginning in the 1880s, the women worked at the Harvard College Observatory analyzing glass photographic plates of the night sky. They calculated the relative size and distance of the stars and developed a stellar classification system that is still in use today. Smithsonian magazine characterized their work as providing "the empirical foundations for larger astronomical theory," but they have been neglected by history.