Astronaute = struct('nom',{'Neil Armstrong','Michael Collins','Buzz Algrin',...
    'John Young','Jim Lovell','Frank Borman'},'mission',{{'Gemini 8','Apollo 11'},...
    {'Gemini 10','Apollo 11'},{'Gemini 12','Apollo 11'},{'Gemini 3','Gemini 10','Apollo 10','Apollo 16'},...
    {'Gemini 7','Gemini 12','Apollo 8','Apollo 13'},{'Gemini 7','Apollo 8'}});