The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 75
... minutes , during which time the ship would cover a distance of a hundred and sixty miles . It would certainly seem dangerous - not to mention hard on the nerves of the crew ! -to wait until the Moon was so close before doing any braking ...
... minutes , during which time the ship would cover a distance of a hundred and sixty miles . It would certainly seem dangerous - not to mention hard on the nerves of the crew ! -to wait until the Moon was so close before doing any braking ...
Pagina 88
... minutes before . It is worth mentioning that , for some purposes , the use of light waves might be more convenient than radio . A beam of light can easily be modulated by speech , and , in the heliograph , it was used for sending Morse ...
... minutes before . It is worth mentioning that , for some purposes , the use of light waves might be more convenient than radio . A beam of light can easily be modulated by speech , and , in the heliograph , it was used for sending Morse ...
Pagina 96
... minutes even in the sitting position . Lying down , the tolerance to acceleration is very greatly increased and a man can survive even twenty gravities for periods of up to a minute . The human body is built , therefore , to far more ...
... minutes even in the sitting position . Lying down , the tolerance to acceleration is very greatly increased and a man can survive even twenty gravities for periods of up to a minute . The human body is built , therefore , to far more ...
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