The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 125
... exist , and indeed there is some evidence for mountains near the south pole . The icecap occasionally splits into two sections as it shrinks , leaving an isolated white patch which is always at the same location , as might be expected ...
... exist , and indeed there is some evidence for mountains near the south pole . The icecap occasionally splits into two sections as it shrinks , leaving an isolated white patch which is always at the same location , as might be expected ...
Pagina 127
... exist , can obtain the oxygen they need from the soil rather than from the atmosphere . It should be remembered that the other basic raw materials for plant life are carbon dioxide , water , and sunlight , all of which are certainly ...
... exist , can obtain the oxygen they need from the soil rather than from the atmosphere . It should be remembered that the other basic raw materials for plant life are carbon dioxide , water , and sunlight , all of which are certainly ...
Pagina 128
... exist on the planet . Even if they do not actually form unbroken lines , many of them seem to be arranged in a rectilinear fashion- but this does not mean that they must be artificial . They could quite possibly be old river beds ...
... exist on the planet . Even if they do not actually form unbroken lines , many of them seem to be arranged in a rectilinear fashion- but this does not mean that they must be artificial . They could quite possibly be old river beds ...
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