The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 67
... simple and effective method is to pass the air through a chilled pipe and condense the water out of it . On very long voyages , the chemicals needed for oxygen replenishment would weigh a considerable amount , and it has been seriously ...
... simple and effective method is to pass the air through a chilled pipe and condense the water out of it . On very long voyages , the chemicals needed for oxygen replenishment would weigh a considerable amount , and it has been seriously ...
Pagina 81
... simple geometry fixes the spaceship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple ...
... simple geometry fixes the spaceship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple ...
Pagina 82
... simple astronomical method of doing this , unless use can be made of the Doppler effect- the alteration of the frequency of light caused when one is moving towards a source or away from it . This effect is extremely small at the sort of ...
... simple astronomical method of doing this , unless use can be made of the Doppler effect- the alteration of the frequency of light caused when one is moving towards a source or away from it . This effect is extremely small at the sort of ...
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