The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 51
... matter of weightlessness is perhaps the cause of more con- fusion than anything else in astronautics . One can , however , avoid all difficulty by remembering the simple rule that , outside an atmosphere , a spaceship and its contents ...
... matter of weightlessness is perhaps the cause of more con- fusion than anything else in astronautics . One can , however , avoid all difficulty by remembering the simple rule that , outside an atmosphere , a spaceship and its contents ...
Pagina 62
... matter , as the rapidly moving gases could contaminate a very large area . This fact may well make it unsafe for nuclear - powered rockets to take off from the Earth's surface , but would not rule out their use in space . Once again ...
... matter , as the rapidly moving gases could contaminate a very large area . This fact may well make it unsafe for nuclear - powered rockets to take off from the Earth's surface , but would not rule out their use in space . Once again ...
Pagina 110
... matter of building a slightly modified form of diving suit and hoping that that will do the problems involved are entirely different . In the space - suit , because there is no pressure outside , there will be a very considerable force ...
... matter of building a slightly modified form of diving suit and hoping that that will do the problems involved are entirely different . In the space - suit , because there is no pressure outside , there will be a very considerable force ...
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