The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 29
... develop more powerful fuels , or employ vehicles with more than one stage of propulsion . Before leaving the rocket for the ... developed . We do this because experience has shown that , though many people can see from the example of the ...
... develop more powerful fuels , or employ vehicles with more than one stage of propulsion . Before leaving the rocket for the ... developed . We do this because experience has shown that , though many people can see from the example of the ...
Pagina 37
... be avoided : for the moment let us explore the possibilities of purely automatic rockets — which might be called " reconnaissance missiles . " A great deal of scientific equipment has already been developed Escaping from Earth 37.
... be avoided : for the moment let us explore the possibilities of purely automatic rockets — which might be called " reconnaissance missiles . " A great deal of scientific equipment has already been developed Escaping from Earth 37.
Pagina 121
... develop although this seems contrary to what one would expect from theory . All the planets appear to have been ... developed flying machines which could take them above the clouds , or radio equipment which could pick up the waves ...
... develop although this seems contrary to what one would expect from theory . All the planets appear to have been ... developed flying machines which could take them above the clouds , or radio equipment which could pick up the waves ...
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