The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 90
... practical purposes , this is a perfect vacuum : certainly the " interstellar gas " will be of no importance in travel between the planets , though , as we shall see in Chapter 16 , it might be significant when we begin to think of ...
... practical purposes , this is a perfect vacuum : certainly the " interstellar gas " will be of no importance in travel between the planets , though , as we shall see in Chapter 16 , it might be significant when we begin to think of ...
Pagina 97
... practical , solution involves the use of centrifugal force . Consider a spaceship of circular cross section [ Figure 16 ( a ) ] spinning about its axis . Then , if there is no other force acting— that is , if the ship is in " free orbit ...
... practical , solution involves the use of centrifugal force . Consider a spaceship of circular cross section [ Figure 16 ( a ) ] spinning about its axis . Then , if there is no other force acting— that is , if the ship is in " free orbit ...
Pagina 168
... practical importance , because the stars must remain forever beyond our reach ? This view is held even by some who are quite convinced of the possibility of interplanetary flight . It is , nevertheless , curious how often the subject of ...
... practical importance , because the stars must remain forever beyond our reach ? This view is held even by some who are quite convinced of the possibility of interplanetary flight . It is , nevertheless , curious how often the subject of ...
Cuprins
The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
1 | 118 |
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acceleration airless asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew diameter difficult distance Earth energy engineering enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gases gravitational field gravity heat hundred hydrogen imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing LEWIS CARROLL light light-years lunar Mars and Venus Martian means Mercury meteors miles million minutes missiles Moon Moon's motors never normal observed orbit oxygen payload perhaps planetary Plate Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-stations space-suits space-travel spaceship speed spinning stars stations structure sunlight surface take-off tanks telescope temperature thousand thrust trolley Uranus vehicle voyage weight weightless