How big is everything? How much everything even is there? We have answers to these questions because of Henrietta Swan Leavitt, one of my favorite astronomers. Leavitt passed away on this day, December 12, in 1921, a too-young 53, taken by stomach cancer.
Leavitt was one of the computers at the Harvard College Observatory. Before adopting the name to describe machines that crunch numbers, computers were low-level staff, often women, who did the complicated [Continue reading]