He invented a double - reaction jet engine , developed multi-stage rockets , suggested a Moon mission and solar radiation powered spaceships .
Luigi Gussalli ( 1885 -- 1950 ) , astronautics pioneer since the ' 20s , corresponded with international space scientists such as Oberth and Goddard .
Luigi Gussalli invented a double - reaction jet engine , developed multi-stage rockets , suggested a Moon mission and solar radiation powered spaceships .
Luigi Gussalli ( 1885 -- 1950 ) , astronautics pioneer since the ' 20s , corresponded with international space scientists such as Oberth and Goddard .