The Exploration of SpacePocket Books, 1979 - 237 pagini Presents a nonscientific explanation of space exploration and a view of future life on other planets. |
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Pagina 117
... range without put- ting up power . It is reasonable to suppose that a spaceship could carry such a collector , folded up like an umbrella , with an effective area of a square yard or more . Very much larger mirrors could be employed at ...
... range without put- ting up power . It is reasonable to suppose that a spaceship could carry such a collector , folded up like an umbrella , with an effective area of a square yard or more . Very much larger mirrors could be employed at ...
Pagina 154
... range in size from eight thousand miles in diameter downwards , and all have a density several times that of water . They can properly be called " terrestrial type " planets , and they probably consist of much the same materials as does ...
... range in size from eight thousand miles in diameter downwards , and all have a density several times that of water . They can properly be called " terrestrial type " planets , and they probably consist of much the same materials as does ...
Pagina 213
... range of present achievement . If this became prac- ticable , it might extend the range of space - flight almost indefinitely assuming that travelers could be found willing to return to Earth perhaps generations after their departure 213.
... range of present achievement . If this became prac- ticable , it might extend the range of space - flight almost indefinitely assuming that travelers could be found willing to return to Earth perhaps generations after their departure 213.
Cuprins
Preface to the 1951 Edition | 11 |
Thirty Years Later | 15 |
The Shaping of the Dream | 21 |
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acceleration airless already astronautics astronomers atmo atmosphere body bricks build carry certainly Chapter chemical completely conquest of space consider course crew degrees F difficult direction distance Earth energy enormous escape velocity exist exploration extremely fact Figure fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere Jerry Pournelle journey Jupiter landing large number light light-years lunar Mars and Venus Martian means Mercury meteors miles in diameter million minutes missile Moon Moon's motors never normal observed once oxygen payload perhaps planetary planets Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri radar radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spin stars stations surface take-off telescope temperature thousand thrust tion trolley voyage weight weightless