The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 53
... less as long as the rockets are shut off . It does not matter in the least where the ship may be - close to a planet or in the depths of space . When the rockets were turned on again , the resulting accelera- tion caused by the thrust ...
... less as long as the rockets are shut off . It does not matter in the least where the ship may be - close to a planet or in the depths of space . When the rockets were turned on again , the resulting accelera- tion caused by the thrust ...
Pagina 81
... less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple one . An alternative though less accurate method of position - finding would be ...
... less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple one . An alternative though less accurate method of position - finding would be ...
Pagina 180
... less to the travellers themselves . To imagine any long - range exploration of the Universe we have to assume voyages lasting many centuries , or even millions of years . Such voyages could be possible only if whole generations were ...
... less to the travellers themselves . To imagine any long - range exploration of the Universe we have to assume voyages lasting many centuries , or even millions of years . Such voyages could be possible only if whole generations were ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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Termeni și expresii frecvente
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