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 136
... telescope of quite moderate size - that limit being usually set by the turbulence and irregularities of the atmosphere . Often , indeed , a large telescope may not perform as well as a smaller one , though on those rare occasions when ...
... telescope of quite moderate size - that limit being usually set by the turbulence and irregularities of the atmosphere . Often , indeed , a large telescope may not perform as well as a smaller one , though on those rare occasions when ...
Pagina 188
... telescope on Mount Palomar were not primarily optical ones : they were largely due to the fact that the mirror and its auxiliaries had to remain rigid to a few millionths of an inch , no matter how the enormously heavy instrument was ...
... telescope on Mount Palomar were not primarily optical ones : they were largely due to the fact that the mirror and its auxiliaries had to remain rigid to a few millionths of an inch , no matter how the enormously heavy instrument was ...
Pagina 189
... telescopes " employing not light rays but radio waves , which have much greater penetrating power and so may be able to ... telescope ) but even so its revolving power — that is , its ability to separate close objects - is thousands of ...
... telescopes " employing not light rays but radio waves , which have much greater penetrating power and so may be able to ... telescope ) but even so its revolving power — that is , its ability to separate close objects - is thousands of ...
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