the father of american rocketry. koski, known as the father of cosmonaut x he published in paper on it. and in the 1950s they do very important work on ion propulsion. you are making the entirely accurate point that engineers at hughes aircraft and elsewhere did, it was worked on by people in nassau and private industry from the 50s up until the present. so there is a rich history there of many very creative and talented people contributing to the development of it. if i suggested that jpl was the organization that developed it or thought of it, or was the only one to work on it, i did not mean to suggest that. when i set i raise the question of how could we travel around the solar system more easily and less expensively, it was that we could turn to the ion propulsion that brilliant people have been working on for nearly one century. >> it is very important for this travel, why did jpl not follow it exactly and it had such importance. >> i'd be happy to talk to about this more, but you may have some perhaps incomple

the first recorded thoughts about ion propulsion were by robert godard in 1906, the father of american rocketry. constantine kalkaski , known as the father of cos monautics published a paper on it. a colleague in the 1950s did very important work on ion propulsion. you're making the entirely accurate point that engineers at hughes aircraft and elsewhere did. it was worked on by people in nasa and private industry from the '50s up to the present. so, i mean, there's a rich history here of many very creative and talented people contributing to the development of it. and if i suggested that jpl was the organization that developed it or thought of it or was the only one that worked on it, i didn't mean to suggest that. i said when i raised the question of how could we travel around the solar system more easily and less expensively it was that we could turn to the ion propulsion that people, brilliant people have been working on for nearly a century. audience: now, was it -- it's very important to travel. why did jpl not follow it exactly exactly, and then with such a purpose. marc: i'd be happy to

first recorded thoughts about ion propulsion were by godard in 1906, the rocketry. american known as e kalkaski , the father of cos monautics published a paper on it. in the 1950s did very important work on ion propulsion. entirely ing the accurate point that engineers at ughes aircraft and elsewhere did. it was worked on by people in from nd private industry the '50s up to the present. so, i mean, there's a rich of many very creative and talented people ontributing to the development of it. suggested that jpl was developed ation that it or thought of it or was the only one that worked on it, i that. mean to suggest i said when i raised the question of how could we travel round the solar system more easily and less expensively it was that we could turn to the people, lsion that brilliant people have been working on for nearly a century. was it -- it's to travel.ant hy did jpl not follow it exact exactly, and then with such a purpose. be happy to talk with you about this more elsewhere, but you may have some perhaps incomplete perceptions of jpl's role in the development. sol