The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 28
... structure weighing only one ton seemed beyond the bounds of engineering sanity . That one ton , remember , has to cover the weight of the tanks , the rocket motor , the control equipment , the structural framework — and the payload ...
... structure weighing only one ton seemed beyond the bounds of engineering sanity . That one ton , remember , has to cover the weight of the tanks , the rocket motor , the control equipment , the structural framework — and the payload ...
Pagina 56
... structures which need not even be strong enough to stand up under their own weight . The only forces the " deep space ... structure , and the ship might consist of a small , compact crew chamber and a series of very large and apparently ...
... structures which need not even be strong enough to stand up under their own weight . The only forces the " deep space ... structure , and the ship might consist of a small , compact crew chamber and a series of very large and apparently ...
Pagina 164
... structure of the Universe through the screen of stars which hid them from the rest of space . As will be seen , stars vary greatly among themselves in physical structure , as well as in size and brilliance . Some of the giants are so ...
... structure of the Universe through the screen of stars which hid them from the rest of space . As will be seen , stars vary greatly among themselves in physical structure , as well as in size and brilliance . Some of the giants are so ...
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