The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 51
... hundred miles up for a rocket which had to circle the Earth for not more than a few days . In the case of a permanent structure , like the " space - stations " described in Chapter 15 , the minimum height might be five hundred or even a ...
... hundred miles up for a rocket which had to circle the Earth for not more than a few days . In the case of a permanent structure , like the " space - stations " described in Chapter 15 , the minimum height might be five hundred or even a ...
Pagina 117
... hundred miles up from Earth ! Another possibility is worth mentioning here . Because the Moon has no atmosphere ... hundred miles long . But fuel containers , if properly designed , could withstand accelerations of perhaps a hundred ...
... hundred miles up from Earth ! Another possibility is worth mentioning here . Because the Moon has no atmosphere ... hundred miles long . But fuel containers , if properly designed , could withstand accelerations of perhaps a hundred ...
Pagina 152
... hundred miles up ) whereas the astronomical ones would be at ten or a hundred times this distance . In this connexion , however , it should be pointed out that it is much " cheaper " , in terms of energy , to establish a close satellite ...
... hundred miles up ) whereas the astronomical ones would be at ten or a hundred times this distance . In this connexion , however , it should be pointed out that it is much " cheaper " , in terms of energy , to establish a close satellite ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole