The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 37
... impossible , certainly fantastic . We will see later how this difficulty may be avoided : for the moment let us explore the possibilities of purely automatic rockets — which might be called " reconnaissance missiles . " A great deal of ...
... impossible , certainly fantastic . We will see later how this difficulty may be avoided : for the moment let us explore the possibilities of purely automatic rockets — which might be called " reconnaissance missiles . " A great deal of ...
Pagina 85
... impossible . It would take five and nine minutes respectively to get replies from Venus and Mars , even at their closest to the Earth ! This difficulty is a fundamental one , and has nothing to do with the inadequacies of our present ...
... impossible . It would take five and nine minutes respectively to get replies from Venus and Mars , even at their closest to the Earth ! This difficulty is a fundamental one , and has nothing to do with the inadequacies of our present ...
Pagina 149
... impossible to draw a hard and fast line between the type of experiment being conducted in today's artificial satellites and that which would be done in manned space - labs . To a large extent the work will overlap , for many experiments ...
... impossible to draw a hard and fast line between the type of experiment being conducted in today's artificial satellites and that which would be done in manned space - labs . To a large extent the work will overlap , for many experiments ...
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