The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 66
... spaceship which might be travelling for weeks or months the pressure must be kept at a value comfortable and safe for the crew . There is no need , however , for it to be as high as the standard sea - level value of fifteen pounds per ...
... spaceship which might be travelling for weeks or months the pressure must be kept at a value comfortable and safe for the crew . There is no need , however , for it to be as high as the standard sea - level value of fifteen pounds per ...
Pagina 82
... spaceships would attain , and it would be very difficult to measure it accurately . A much more practical method would involve the use of radio stations on the planets . To take a simple case , suppose the spaceship were near the Earth ...
... spaceships would attain , and it would be very difficult to measure it accurately . A much more practical method would involve the use of radio stations on the planets . To take a simple case , suppose the spaceship were near the Earth ...
Pagina 91
... spaceship , the danger of meteors assumes its true proportions . Although at the speeds concerned ( meteor velocities up to 160,000 m.p.h. may be encountered ) particles only a few thousandths of an inch across could be dangerous , the ...
... spaceship , the danger of meteors assumes its true proportions . Although at the speeds concerned ( meteor velocities up to 160,000 m.p.h. may be encountered ) particles only a few thousandths of an inch across could be dangerous , the ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets body bricks British Astronomical Association build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust trolley Uranus voyage weight