Galaxies and Relativistic Astrophysics D 79111 Freiburg Siedlungsgeographische Gliederung von Turkestan philosophy of psychology Siedlungsgeographische Gliederung von Turkestan Kapitel 12 The Netherlands' Universities Institute for Coordination of Research in Social Sciences (SISWO) It was BAADE who in the early fifties stimulated observational and theoretical work concerning the colour magnitude diagrams of star clusters and their connection with the nuclear evolution of stars this type of research opened also the way towards much more difficult and far reaching fields of research: the formation of galaxies and the origin of the chemical elements and their abundance distributions