GalaxiesBy: Or Graur Series: The MIT Press Essential Knowledge series An eminently readable overview of the history and physics of galaxies. In Galaxies, Or Graur offers a brief and fascinating overview of the history, physics, and astrophysical uses of galaxies. Starting with the history of the last two thousand years of galaxy studies, Graur discusses the types of galaxies we observe and the physics that drive them; the myths and physical structure of the