The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 2
... imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space travel was neglected for almost fifteen hundred years . When it was again renewed , it was in a ...
... imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space travel was neglected for almost fifteen hundred years . When it was again renewed , it was in a ...
Pagina 74
... imagine that a rocket descending tail first in this manner would be a highly unstable affair and liable to " topple . ” But it must be remembered that , as far as the automatic controls are concerned , there is no fundamental difference ...
... imagine that a rocket descending tail first in this manner would be a highly unstable affair and liable to " topple . ” But it must be remembered that , as far as the automatic controls are concerned , there is no fundamental difference ...
Pagina 163
... imagine . Let us imagine the sunrise on the planet of a multiple star [ Plate XVI ] . Coming up over the horizon is a double star of the Beta Lyrae type . The two components are very large and , unlike our own Sun , are not spherical ...
... imagine . Let us imagine the sunrise on the planet of a multiple star [ Plate XVI ] . Coming up over the horizon is a double star of the Beta Lyrae type . The two components are very large and , unlike our own Sun , are not spherical ...
Cuprins
The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
1 | 118 |
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acceleration airless asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew diameter difficult distance Earth energy engineering enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gases gravitational field gravity heat hundred hydrogen imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing LEWIS CARROLL light light-years lunar Mars and Venus Martian means Mercury meteors miles million minutes missiles Moon Moon's motors never normal observed orbit oxygen payload perhaps planetary Plate Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-stations space-suits space-travel spaceship speed spinning stars stations structure sunlight surface take-off tanks telescope temperature thousand thrust trolley Uranus vehicle voyage weight weightless