The Matter in the Universe with Vera Rubin

As the NSF-DOE Vera C. Rubin Observatory, a joint project of the U.S. National Science Foundation and the U.S. Department of Energy Office of Science, begins its mission to unlock new understanding of cosmic phenomena, we visit an archival lecture from its namesake, Vera C. Rubin. In the lecture, she discussed how galaxies form, how you might measure the matter in them and her observations of dark matter.