The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 53
... matter of weightlessness is perhaps the cause of more confusion 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 are ...
... matter of weightlessness is perhaps the cause of more confusion 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 are ...
Pagina 64
... 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 112
... matter of building a slighty 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 slighty 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 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mare Imbrium Mars and Venus Martian means Mercury meteors million minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust tion trolley Uranus voyage weight