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 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets body bricks British Astronomical Association build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust trolley Uranus voyage weight