The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 37
... hundred tons of rocket propellant to place one ton of payload into a satellite orbit . Be- cause of this depressing ... hundreds but hundreds of thousands of tons — and the whole project becomes , if not impossible , certainly fantastic ...
... hundred tons of rocket propellant to place one ton of payload into a satellite orbit . Be- cause of this depressing ... hundreds but hundreds of thousands of tons — and the whole project becomes , if not impossible , certainly fantastic ...
Pagina 50
... hundred miles from the Earth ! ) . Secondly it is in a vacuum , so that its motors can operate at maximum efficiency . And thirdly it is in a condition of " weightlessness . ' 99 As a result of countless stories on the subject , most ...
... hundred miles from the Earth ! ) . Secondly it is in a vacuum , so that its motors can operate at maximum efficiency . And thirdly it is in a condition of " weightlessness . ' 99 As a result of countless stories on the subject , most ...
Pagina 52
... hundred miles away from the first vessel , and had an error in speed of a hundred miles an hour in the direction of the satellite , it would have at least an hour in which to correct this by low - powered rocket thrusts . There are ...
... hundred miles away from the first vessel , and had an error in speed of a hundred miles an hour in the direction of the satellite , it would have at least an hour in which to correct this by low - powered rocket thrusts . There are ...
Cuprins
The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
1 | 118 |
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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