The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 10
... satellites , only about half an inch across . Outwards from Mars is a great gulf , empty save for thousands of minor planets or " asteroids , " few of which on this scale are much larger than grains of sand . We have to travel 483 miles ...
... satellites , only about half an inch across . Outwards from Mars is a great gulf , empty save for thousands of minor planets or " asteroids , " few of which on this scale are much larger than grains of sand . We have to travel 483 miles ...
Pagina 136
... satellites , being about 3,000 miles in diameter , but for some reason it has never been officially named and the " Nautical Almanac , " the arbiter in such matters , always refers to it long - windedly as " the satellite of Neptune ...
... satellites , being about 3,000 miles in diameter , but for some reason it has never been officially named and the " Nautical Almanac , " the arbiter in such matters , always refers to it long - windedly as " the satellite of Neptune ...
Pagina 157
... satellites will be built elsewhere than near the Earth . Often there would be existing asteroids or small moons which might provide a foundation on which to work and could also supply much of the necessary structural material . In this ...
... satellites will be built elsewhere than near the Earth . Often there would be existing asteroids or small moons which might provide a foundation on which to work and could also supply much of the necessary structural material . In this ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbors | 9 |
The Rocket | 17 |
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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 satellites 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