What field of work do both Gerhard Thiele and Léopold Eyharts have in common?
Gerhard Thiele: Dr. Gerhard Paul Julius Thiele (born September 2, 1953) is a German physicist and a former ESA astronaut. Léopold Eyharts: Léopold Eyharts (born April 28, 1957) is a Brigadier General in the French Air Force, an engineer and ESA astronaut.
ESA astronaut