The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 18
... hundred miles vertically , then it could carry explosives a considerably greater distance horizontally . All Goddard's initial pioneering work was financed by a grant of some $ 11,000 , but the German 1 Priority for the first scientific ...
... hundred miles vertically , then it could carry explosives a considerably greater distance horizontally . All Goddard's initial pioneering work was financed by a grant of some $ 11,000 , but the German 1 Priority for the first scientific ...
Pagina 51
... hundred miles up for a rocket which had to circle the Earth for not more than a few days . In the case of a permanent struc- ture , like the " space - stations " described in Chapter 15 , the mini- mum height might be five hundred or ...
... hundred miles up for a rocket which had to circle the Earth for not more than a few days . In the case of a permanent struc- ture , like the " space - stations " described in Chapter 15 , the mini- mum height might be five hundred or ...
Pagina 150
... hundred miles up ) whereas the astronomical ones would be at ten or a hundred times this distance . In this connexion , however , it should be pointed out that it is much " cheaper " , in terms of energy , to establish a close satellite ...
... hundred miles up ) whereas the astronomical ones would be at ten or a hundred times this distance . In this connexion , however , it should be pointed out that it is much " cheaper " , in terms of energy , to establish a close satellite ...
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