Tuesday, we’re talking about the 19 th -century women who measured the cosmos. Science journalist Dava Sobel is among our guests. Her latest book is about the women employed by Harvard Observatory to serve as “human computers.” They did calculations based on the observations of their male counterparts, but became astronomical pioneers in their own right. Pygmalion Theatre Company is staging a play based on the life of one of these remarkable women, which gives us an excuse to talk about them and