The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 32
... surface , therefore , as we look up at the planets and wonder how we can reach them , are in rather the same position as people at the bottom of a perfectly smooth pit or funnel 4,000 miles deep , set in the surface of an endless , flat ...
... surface , therefore , as we look up at the planets and wonder how we can reach them , are in rather the same position as people at the bottom of a perfectly smooth pit or funnel 4,000 miles deep , set in the surface of an endless , flat ...
Pagina 104
... surface , but it shows only a fraction of the detail which the trained eye can observe through a moderate- sized telescope . Drawings such as those in Plate IX are necessary to fill in the picture , and their production is a challenge ...
... surface , but it shows only a fraction of the detail which the trained eye can observe through a moderate- sized telescope . Drawings such as those in Plate IX are necessary to fill in the picture , and their production is a challenge ...
Pagina 126
... surface of Mars is certainly very low- perhaps a fifteenth of its sea - level value here . We would have to ascend higher than the summit of Mount Everest to encounter so low a pressure on Earth , and even if the Martian atmosphere con ...
... surface of Mars is certainly very low- perhaps a fifteenth of its sea - level value here . We would have to ascend higher than the summit of Mount Everest to encounter so low a pressure on Earth , and even if the Martian atmosphere con ...
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