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 205
... years , then relapsing again . Such changes , as long as they were not too ... light are concerned , for planets with temperatures between the boiling and ... years . All the stars , including of course our Sun , are in motion through ...
... years , then relapsing again . Such changes , as long as they were not too ... light are concerned , for planets with temperatures between the boiling and ... years . All the stars , including of course our Sun , are in motion through ...
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 213
... light . Suppose it left Earth at an acceleration of two gravities and main- tained this until it had reached its final speed . Then , from the viewpoint of the crew , the period of accelera- tion would have lasted just over a year . But ...
... light . Suppose it left Earth at an acceleration of two gravities and main- tained this until it had reached its final speed . Then , from the viewpoint of the crew , the period of accelera- tion would have lasted just over a year . But ...
Cuprins
Preface to the 1951 Edition | 11 |
Thirty Years Later | 15 |
The Shaping of the Dream | 21 |
Drept de autor | |
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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