The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 52
... perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps a better phrase ...
... perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps a better phrase ...
Pagina 57
... perhaps , two main types , one of which is sub - divided . They are as follows : ( A ) The multistep rocket with a winged final stage , which is used to take material up to the orbit round the Earth , and then returns by atmospheric ...
... perhaps , two main types , one of which is sub - divided . They are as follows : ( A ) The multistep rocket with a winged final stage , which is used to take material up to the orbit round the Earth , and then returns by atmospheric ...
Pagina 187
... perhaps unparalleled in history . Now there are a good many people who think that we have already learned more than enough about the Universe in which we live . There are others ( including perhaps most scientists ) who adopt the non ...
... perhaps unparalleled in history . Now there are a good many people who think that we have already learned more than enough about the Universe in which we live . There are others ( including perhaps most scientists ) who adopt the non ...
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