The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 11
... limit to the height at which conventional aircraft can ever operate . That limit is between 10 and 15 miles - or , roughly speaking , where the air pressure is more than one THE EARTH AND ITS NEIGHBOURS 13.
... limit to the height at which conventional aircraft can ever operate . That limit is between 10 and 15 miles - or , roughly speaking , where the air pressure is more than one THE EARTH AND ITS NEIGHBOURS 13.
Pagina 40
... limit : once that limit has been agreed , a country would appear to have no redress if an inquisitive neighbour started making rocket reconnaissances as long as they were at a legal height ! We will return , in Chapter 15 , to some of ...
... limit : once that limit has been agreed , a country would appear to have no redress if an inquisitive neighbour started making rocket reconnaissances as long as they were at a legal height ! We will return , in Chapter 15 , to some of ...
Pagina 180
... limits set by the laws of Nature ( and we must assume that eventually these limits will be reached , even though we are very far from them today ) it will be possible to send expeditions to the nearer stars and for them to return within ...
... limits set by the laws of Nature ( and we must assume that eventually these limits will be reached , even though we are very far from them today ) it will be possible to send expeditions to the nearer stars and for them to return within ...
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