The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 40
... Moon . As it will pick up speed during its fall , its impact velocity will be at least 5,000 mph , contributed by the Moon's own gravitational field , together with any excess speed that it started with . ( These speeds cannot be added ...
... Moon . As it will pick up speed during its fall , its impact velocity will be at least 5,000 mph , contributed by the Moon's own gravitational field , together with any excess speed that it started with . ( These speeds cannot be added ...
Pagina 107
... Moon , there would be no trace of them at all and the temperature would be constant at about 30 degrees F. - We have no information at all about the Moon's chemical com- position : its density is considerably less than the Earth's , but ...
... Moon , there would be no trace of them at all and the temperature would be constant at about 30 degrees F. - We have no information at all about the Moon's chemical com- position : its density is considerably less than the Earth's , but ...
Pagina 114
... Moon's surface rocks without too much difficulty . An under- ground settlement would be easy to air- and temperature ... Moon , the whole picture would change and the economics of space - flight would improve by a factor of ten or more ...
... Moon's surface rocks without too much difficulty . An under- ground settlement would be easy to air- and temperature ... Moon , the whole picture would change and the economics of space - flight would improve by a factor of ten or more ...
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