The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 5
... difficult to show that a substance like Wells ' " Cavo- rite " is a physical impossibility , defying fundamental laws of nature . But the idea of anti - gravity is not in itself absurd , and we shall return to it in Chapter 17 . Wells ...
... difficult to show that a substance like Wells ' " Cavo- rite " is a physical impossibility , defying fundamental laws of nature . But the idea of anti - gravity is not in itself absurd , and we shall return to it in Chapter 17 . Wells ...
Pagina 146
... difficult to say how long it would take to build bases on this scale , for we know too little about conditions upon Mars . When we reach the planet , we may discover factors which change the situation radically - for better or for worse ...
... difficult to say how long it would take to build bases on this scale , for we know too little about conditions upon Mars . When we reach the planet , we may discover factors which change the situation radically - for better or for worse ...
Pagina 188
... difficult to locate , if it were covered with light and radar - absorbing paint . , It is one of the tragic ironies of our age that the rocket , which could have been the symbol of humanity's aspirations for the stars , has become one ...
... difficult to locate , if it were covered with light and radar - absorbing paint . , It is one of the tragic ironies of our age that the rocket , which could have been the symbol of humanity's aspirations for the stars , has become one ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks 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 giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mare Imbrium Mars and Venus Martian means Mercury meteors million 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 tion trolley Uranus voyage weight