Student, Technology University Berlin, 1966. Diploma in astronomy, North Atlantic Treaty Organization Advanced Study Institute, Athens, 1964. Diploma in planetary and environmental science, University Miami, 1966.
Chairman, Wilhelm Foerster Observatory, Berlin, 1972-1986; special participant Viking Team (Mars), Jet Propulsion Laboratory/National Aeronautics and Space Administration, Pasadena, California, 1976; senior science editor, Rias Berlin & Deutsche Welle, Berlin, 1977-1995; freelance science writer, space consultant, Berlin, since 1995. Head of satellite tracking station Wilhelm Foerster Observatory, 1960-1977.
Member Planetary Society (millenium committee since 1996), British Interplanetary Society, American Institute Aeronautics and Astronautics.
Married Renate B. Stein, May 23, 1969. Children: Nicolas, Anne-Kathrin.