Jü rgen Schaffner-Bielich is a professor in theoretical astrophysics at Goethe-Universitä t Frankfurt Am Main. Since completing his Ph. D. , he has worked at the Niels Bohr Institute, the Lawrence Berkeley National Laboratory as Feodor-Lynen fellow of the Humboldt Foundation, the RIKEN BNL Research Center at the Brookhaven National Laboratory, Columbia University, New York, and as a professor at the University of Heidelberg.