The Exploration of SpaceHarper, 1951 - 199 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 16
Pagina 66
... normal atmospheric value , and up to four or five times this . The actual limits depend on the length of time the abnormal conditions last : clearly in a spaceship which might be travelling for weeks or months the pressure must be kept ...
... normal atmospheric value , and up to four or five times this . The actual limits depend on the length of time the abnormal conditions last : clearly in a spaceship which might be travelling for weeks or months the pressure must be kept ...
Pagina 96
... normal weight - since gravity is adding its own force to that produced by the thrust of the rockets . Now it is possible for a man in normal health to stand such accelerations for two or three minutes even in the sitting position ...
... normal weight - since gravity is adding its own force to that produced by the thrust of the rockets . Now it is possible for a man in normal health to stand such accelerations for two or three minutes even in the sitting position ...
Pagina 97
... normal weight : we simply have to put them in a centrifuge and whirl them round . But there is no way at all of weakening gravity . The only thing we can do is to look carefully at the functioning of the body , decide how gravity ...
... normal weight : we simply have to put them in a centrifuge and whirl them round . But there is no way at all of weakening gravity . The only thing we can do is to look carefully at the functioning of the body , decide how gravity ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
Drept de autor | |
16 alte secțiuni nu sunt arătate
Alte ediții - Afișează-le pe toate
Termeni și expresii frecvente
acceleration already asteroids astronautics astronomers atmosphere body bricks 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 ionosphere journey Jupiter landing light light-years lunar Mare Imbrium 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 tion trolley Uranus voyage weight