The Exploration of Space |
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Pagina 152
Although , as is invariably the case , we shall not discover the full value of space - stations until we have actually constructed them , some of their uses are already obvious . The most important may be listed as follows : ( 1 ) ...
Although , as is invariably the case , we shall not discover the full value of space - stations until we have actually constructed them , some of their uses are already obvious . The most important may be listed as follows : ( 1 ) ...
Pagina 156
A direct beam service could link the station with any point on the hemisphere below , and messages could be ... Complete coverage of the whole Earth would be provided by three stations , revolving in the same orbit but spaced 120 ...
A direct beam service could link the station with any point on the hemisphere below , and messages could be ... Complete coverage of the whole Earth would be provided by three stations , revolving in the same orbit but spaced 120 ...
Pagina 159
This , however , is quite impossible for the stations in circular orbits , which could not change their distances from ... refuelling zone would , of course , have to time their departure to avoid passing too close to an outer station .
This , however , is quite impossible for the stations in circular orbits , which could not change their distances from ... refuelling zone would , of course , have to time their departure to avoid passing too close to an outer station .
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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 moving 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 seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole