The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 96
... seems likely that the condition of weightlessness , though it may take some time to get used to , is not going to be harmful and need not even be unpleasant . ( It may , in fact , be the reverse , for it will make possible at last the ...
... seems likely that the condition of weightlessness , though it may take some time to get used to , is not going to be harmful and need not even be unpleasant . ( It may , in fact , be the reverse , for it will make possible at last the ...
Pagina 162
... seems too small to be a sun and may therefore be a very large planet . There is clearly no hope of detecting worlds as small as Earth by the gravitational disturbances they produce , but if we can dis- cover even a few giant planets by ...
... seems too small to be a sun and may therefore be a very large planet . There is clearly no hope of detecting worlds as small as Earth by the gravitational disturbances they produce , but if we can dis- cover even a few giant planets by ...
Pagina 176
... seem to be one of open - minded skepticism . It certainly seems very probable that there can be no other technically advanced civilization in the Solar System at the present moment , otherwise we would indeed have had every reason to ...
... seem to be one of open - minded skepticism . It certainly seems very probable that there can be no other technically advanced civilization in the Solar System at the present moment , otherwise we would indeed have had every reason to ...
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