The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 24
Arthur Charles Clarke. length because it demonstrates very clearly the fundamental laws of rocket propulsion . A rocket is , in its essentials , a device carry- ing a certain weight of propellant and ejecting it at the greatest possible ...
Arthur Charles Clarke. length because it demonstrates very clearly the fundamental laws of rocket propulsion . A rocket is , in its essentials , a device carry- ing a certain weight of propellant and ejecting it at the greatest possible ...
Pagina 27
Arthur Charles Clarke. to a rocket operating in space , but it plays an appreciable part in the case of a rocket climbing through the atmosphere , cutting down its speed by five or ten per cent ( and very much more in the case of small ...
Arthur Charles Clarke. to a rocket operating in space , but it plays an appreciable part in the case of a rocket climbing through the atmosphere , cutting down its speed by five or ten per cent ( and very much more in the case of small ...
Pagina 35
... rockets , balancing their thrust against gravity . ( In this way , a rocket could use all its fuel and never get more than a few feet above the ground . ) So it cannot be done , at least until we possess sources of energy immensely more ...
... rockets , balancing their thrust against gravity . ( In this way , a rocket could use all its fuel and never get more than a few feet above the ground . ) So it cannot be done , at least until we possess sources of energy immensely more ...
Cuprins
The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
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acceleration airless asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew diameter difficult distance Earth energy engineering enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gases gravitational field gravity heat hundred hydrogen imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing LEWIS CARROLL light light-years lunar Mars and Venus Martian means Mercury meteors miles million minutes missiles Moon Moon's motors never normal observed orbit oxygen payload perhaps planetary Plate Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-stations space-suits space-travel spaceship speed spinning stars stations structure sunlight surface take-off tanks telescope temperature thousand thrust trolley Uranus vehicle voyage weight weightless