The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 35
Arthur Charles Clarke. of the future . Many are already known , in fact , but we cannot yet build the motors to harness them ... known facts are correctly marshalled a much more difficult feat than may be imagined— and a certain line of ...
Arthur Charles Clarke. of the future . Many are already known , in fact , but we cannot yet build the motors to harness them ... known facts are correctly marshalled a much more difficult feat than may be imagined— and a certain line of ...
Pagina 67
... 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 ...
... 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 ...
Pagina 175
... known laboratory experiment to demonstrate this . With ordinary currents and powers the thrust is negligible , but there is no fundamental reason why such a device should not be developed for propulsion , particularly under the ...
... known laboratory experiment to demonstrate this . With ordinary currents and powers the thrust is negligible , but there is no fundamental reason why such a device should not be developed for propulsion , particularly under the ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets body bricks British Astronomical Association build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust trolley Uranus voyage weight