The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 179
... human race can do : history is full of examples , from the Pyramids to the Manhattan Project , of achievements whose difficulty and magnitude were so great that very few people would have considered them possible . The important factors ...
... human race can do : history is full of examples , from the Pyramids to the Manhattan Project , of achievements whose difficulty and magnitude were so great that very few people would have considered them possible . The important factors ...
Pagina 180
... human population to exist on a dozen worlds . Only little minds are impressed by size and number . The im- portance of planetary colonization will lie in the variety and di- versity of cultures which it will make possible - cultures as ...
... human population to exist on a dozen worlds . Only little minds are impressed by size and number . The im- portance of planetary colonization will lie in the variety and di- versity of cultures which it will make possible - cultures as ...
Pagina 181
... human thought far outweighed their immediate practical results . We may expect the same of astronautics . With the expansion of the world's mental horizons may come one of the greatest out- bursts of creative activity ever known . The ...
... human thought far outweighed their immediate practical results . We may expect the same of astronautics . With the expansion of the world's mental horizons may come one of the greatest out- bursts of creative activity ever known . The ...
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