The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 39
... whole project becomes , if not impossible , cer- tainly fantastic . We will see later how this difficulty may be avoided : for the moment let us explore the possibilities of purely automatic rockets - which might be called ...
... whole project becomes , if not impossible , cer- tainly fantastic . We will see later how this difficulty may be avoided : for the moment let us explore the possibilities of purely automatic rockets - which might be called ...
Pagina 122
... whole of our atmosphere . What lies below the clouds we can only guess . Since carbon dioxide is one of the heaviest of the common gases , there is little hope that oxygen might be found at lower levels . Being a lighter gas , it would ...
... whole of our atmosphere . What lies below the clouds we can only guess . Since carbon dioxide is one of the heaviest of the common gases , there is little hope that oxygen might be found at lower levels . Being a lighter gas , it would ...
Pagina 171
... whole may be taking clearer shape . We may have discovered that space is infinite , and the galaxies extend onwards for ever — or we may have proved that it is curved and of limited volume , so that although the total number of galaxies ...
... whole may be taking clearer shape . We may have discovered that space is infinite , and the galaxies extend onwards for ever — or we may have proved that it is curved and of limited volume , so that although the total number of galaxies ...
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