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 44
... equal and opposite reaction . The thrust we pro- duce on the Earth is therefore exactly equal to that which the Earth produces on us , but since there is a somewhat considerable disparity in mass between the two bodies , we alone appear ...
... equal and opposite reaction . The thrust we pro- duce on the Earth is therefore exactly equal to that which the Earth produces on us , but since there is a somewhat considerable disparity in mass between the two bodies , we alone appear ...
Pagina 45
... equal to the speed with which the trolley rolls off to the left . If on the other hand the trolley weighed twice as much as the man , its speed would be only half his , and so on for any other ratio . The law of reaction is as simple as ...
... equal to the speed with which the trolley rolls off to the left . If on the other hand the trolley weighed twice as much as the man , its speed would be only half his , and so on for any other ratio . The law of reaction is as simple as ...
Pagina 81
... equal . In the case of orbital refuel- ing , the problem of contact should be considerably easier . There is no air resistance to worry about and to affect the connecting pipe - lines : one would always have perfect visibility , and ...
... equal . In the case of orbital refuel- ing , the problem of contact should be considerably easier . There is no air resistance to worry about and to affect the connecting pipe - lines : one would always have perfect visibility , and ...
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