The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 62
... problem is getting the heat out of the pile quickly enough to prevent its melting — and then to transfer this heat to the propellant . That is the purely engineering problem , and it is an exceedingly difficult one . But there is also ...
... problem is getting the heat out of the pile quickly enough to prevent its melting — and then to transfer this heat to the propellant . That is the purely engineering problem , and it is an exceedingly difficult one . But there is also ...
Pagina 110
... problem of weight , though it must be remembered that the inertia would be unaltered . ( On the Moon it would be six times easier to lift a sledge hammer than on the Earth - but it would be just as hard to swing it . ) If even this sort ...
... problem of weight , though it must be remembered that the inertia would be unaltered . ( On the Moon it would be six times easier to lift a sledge hammer than on the Earth - but it would be just as hard to swing it . ) If even this sort ...
Pagina 142
... problem is a " marginal ” one . There is little doubt that aircraft could function in the Martian atmosphere , despite its thinness . The fact that gravity has only a third of its terrestrial value would be a great help to flying , and ...
... problem is a " marginal ” one . There is little doubt that aircraft could function in the Martian atmosphere , despite its thinness . The fact that gravity has only a third of its terrestrial value would be a great help to flying , and ...
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