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 118
... light waves might be more convenient than radio . A beam of light can easily be modulated by speech , and , in the heliograph , it was used for sending Morse long before radio was invented . By employing large searchlights as ...
... light waves might be more convenient than radio . A beam of light can easily be modulated by speech , and , in the heliograph , it was used for sending Morse long before radio was invented . By employing large searchlights as ...
Pagina 206
... lights of another city , many miles away . The Andromeda Galaxy is the nearest of the other universes , 1 and it is about 700,000 light - years away . In whatever direction we look ( except those in which clouds of obscuring matter ...
... lights of another city , many miles away . The Andromeda Galaxy is the nearest of the other universes , 1 and it is about 700,000 light - years away . In whatever direction we look ( except those in which clouds of obscuring matter ...
Pagina 212
... light had been approached . As is now well known , at velocities approaching that of light some very peculiar things begin to happen . These were pointed out by Einstein when he formu- lated the Special Theory of Relativity , and they ...
... light had been approached . As is now well known , at velocities approaching that of light some very peculiar things begin to happen . These were pointed out by Einstein when he formu- lated the Special Theory of Relativity , and they ...
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