Ulrich Walter and Mirosław Hermaszewski were both astronauts, which one was also a german physicist and engineer?
Ulrich Walter Prof. Dr. Ulrich Hans Walter (born February 9, 1954) is a German physicist/engineer and a former DFVLR astronaut.
H. Dieter Zeh Heinz-Dieter Zeh (] ; born 8 May 1932 in Braunschweig, Germany), usually referred to as H. Dieter Zeh, is a professor emeritus of the University of Heidelberg and theoretical physicist.