The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 13
... live if the pressure of the surrounding air falls below about one half of its sea - level value , and most men would be practically incapacitated well before this figure was reached . As we ascend from the Earth's surface , the pressure ...
... live if the pressure of the surrounding air falls below about one half of its sea - level value , and most men would be practically incapacitated well before this figure was reached . As we ascend from the Earth's surface , the pressure ...
Pagina 142
... live there without pressure suits and wearing only breathing masks . At the moment , the evidence is certainly against this , but the problem is a " marginal ” one . There is little doubt that aircraft could function in the Martian ...
... live there without pressure suits and wearing only breathing masks . At the moment , the evidence is certainly against this , but the problem is a " marginal ” one . There is little doubt that aircraft could function in the Martian ...
Pagina 156
... live normal lives yet carry out zero - gravity experiments whenever they wished . Other satellites — particularly those used for astronomical research , where instruments have to be kept rigidly fixed for long periods in an unvarying ...
... live normal lives yet carry out zero - gravity experiments whenever they wished . Other satellites — particularly those used for astronomical research , where instruments have to be kept rigidly fixed for long periods in an unvarying ...
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