The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 64
... considers the matter , it could hardly be otherwise . Space - flight involves many different problems , vary- ing ... consider the problem of the air supply . Here at sea level on the Earth , we are under an atmospheric pressure of ...
... considers the matter , it could hardly be otherwise . Space - flight involves many different problems , vary- ing ... consider the problem of the air supply . Here at sea level on the Earth , we are under an atmospheric pressure of ...
Pagina 137
... consider a good vacuum , they are not of much interest to astronautics . Some of the larger specimens may have a solid core but this probably consists of nothing more than a cluster of meteors . Planets , satellites , asteroids , comets ...
... consider a good vacuum , they are not of much interest to astronautics . Some of the larger specimens may have a solid core but this probably consists of nothing more than a cluster of meteors . Planets , satellites , asteroids , comets ...
Pagina 172
... consider the spaceship mentioned on page 171 , which , by converting 90 per cent of its mass into radiation ... considers a spaceship circumnavigating the Cosmos - assuming that this represents a distance of 10,000,000- 000 light years ...
... consider the spaceship mentioned on page 171 , which , by converting 90 per cent of its mass into radiation ... considers a spaceship circumnavigating the Cosmos - assuming that this represents a distance of 10,000,000- 000 light years ...
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