The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 122
... relatively close they would have realized after a few days ' observations , for it would be shifting rapidly against the fixed background of the Milky Way . After several months they would know that the source was traveling round the ...
... relatively close they would have realized after a few days ' observations , for it would be shifting rapidly against the fixed background of the Milky Way . After several months they would know that the source was traveling round the ...
Pagina 151
... relatively short periods of eclipse by the Earth , a space - station would be in con- tinuous sunlight would be of great therapeutic value . So would be the spectacle of the Earth itself , almost filling the sky and going through its ...
... relatively short periods of eclipse by the Earth , a space - station would be in con- tinuous sunlight would be of great therapeutic value . So would be the spectacle of the Earth itself , almost filling the sky and going through its ...
Pagina 174
... relatively brief periods of acceleration . It would not , however , help us to circumvent the restrictions set by the Theory of Rela- tivity . As far as any fact can be experimentally established , it seems certain that no material body ...
... relatively brief periods of acceleration . It would not , however , help us to circumvent the restrictions set by the Theory of Rela- tivity . As far as any fact can be experimentally established , it seems certain that no material body ...
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