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 123
... million million millionth of that of air at sea level . For all practical purposes , this is a perfect vacuum : certainly the " inter- stellar gas " will be of no importance in travel between the planets , though as we shall see in ...
... million million millionth of that of air at sea level . For all practical purposes , this is a perfect vacuum : certainly the " inter- stellar gas " will be of no importance in travel between the planets , though as we shall see in ...
Pagina 204
... million times less dense than our atmosphere : they have been picturesquely christened " red - hot vacuums ! " At the other extreme are stars whose density is thousands of times greater than any substance on Earth . The best - known ...
... million times less dense than our atmosphere : they have been picturesquely christened " red - hot vacuums ! " At the other extreme are stars whose density is thousands of times greater than any substance on Earth . The best - known ...
Pagina 222
... million or ten thousand million is not , fundamentally , what is important . There are already far too many people on this planet , by whatever standards one judges the matter . It would be no cause for boast- ing if , after some ...
... million or ten thousand million is not , fundamentally , what is important . There are already far too many people on this planet , by whatever standards one judges the matter . It would be no cause for boast- ing if , after some ...
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