The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 13
... live if the pressure of the surrounding air falls below about one - half of its sea - level value , and most men would be practically incapacitated well before this figure was reached . As we ascend from the Earth's surface , the ...
... live if the pressure of the surrounding air falls below about one - half of its sea - level value , and most men would be practically incapacitated well before this figure was reached . As we ascend from the Earth's surface , the ...
Pagina 30
... live more two - dimensional existences usually notice it only when we run upstairs in a hurry or sit on a chair which has unaccountably removed itself . There is nothing that anyone has ever been able to do about gravity : it acts on ...
... live more two - dimensional existences usually notice it only when we run upstairs in a hurry or sit on a chair which has unaccountably removed itself . There is nothing that anyone has ever been able to do about gravity : it acts on ...
Pagina 160
... live normal lives yet carry out zero - gravity experiments when- ever they wished . Other satellites — particularly those used for astronomical research , where instruments have to be kept rigidly fixed for long periods in an unvarying ...
... live normal lives yet carry out zero - gravity experiments when- ever they wished . Other satellites — particularly those used for astronomical research , where instruments have to be kept rigidly fixed for long periods in an unvarying ...
Cuprins
Automatic Rocket Surveying Mars | 3 |
The Earth and its Neighbours | 9 |
The Rocket | 17 |
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Termeni și expresii frecvente
acceleration already astronautics astronomers atmosphere 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 giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar involved ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors million 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