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 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole