The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 69
... periods of darkness , and this could best be obtained by the combustion of fuel in a small heater . In general , it can be said that temperature control does not present very great problems on the voyages which we will be undertaking ...
... periods of darkness , and this could best be obtained by the combustion of fuel in a small heater . In general , it can be said that temperature control does not present very great problems on the voyages which we will be undertaking ...
Pagina 83
... period of powered flight . It might then become necessary to alter the ship's course in speed , direction , or both , to correct for this . We have already pointed out , on page 73 , that the actual orientation or attitude of a ...
... period of powered flight . It might then become necessary to alter the ship's course in speed , direction , or both , to correct for this . We have already pointed out , on page 73 , that the actual orientation or attitude of a ...
Pagina 192
... period of Man's existence , and the stamp the length of time during which he has been slightly civilised . The period during which life will be possible on Earth corresponds to a further column of stamps certainly hundreds of yards ...
... period of Man's existence , and the stamp the length of time during which he has been slightly civilised . The period during which life will be possible on Earth corresponds to a further column of stamps certainly hundreds of yards ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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Termeni și expresii frecvente
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