The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 66
... known , plants absorb carbon dioxide ( in the presence of sunlight ) and , after converting it to starch , liberate oxygen . Although this idea is an attractive one at first sight , it loses some of its charm when one considers the ad ...
... known , plants absorb carbon dioxide ( in the presence of sunlight ) and , after converting it to starch , liberate oxygen . Although this idea is an attractive one at first sight , it loses some of its charm when one considers the ad ...
Pagina 136
... known satellites , being about 3,000 miles in diameter , but for some reason it has never been officially named and the " Nautical Almanac , " the arbiter in such matters , always refers to it long - windedly as " the satellite of ...
... known satellites , being about 3,000 miles in diameter , but for some reason it has never been officially named and the " Nautical Almanac , " the arbiter in such matters , always refers to it long - windedly as " the satellite of ...
Pagina 170
... known laboratory experiment to demonstrate this . With ordinary currents and powers the thrust is negligible , but there is no doubt that such a device will soon be developed for propulsion under the conditions prevailing in space . To ...
... known laboratory experiment to demonstrate this . With ordinary currents and powers the thrust is negligible , but there is no doubt that such a device will soon be developed for propulsion under the conditions prevailing in space . 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