The Exploration of SpaceTemple Press, 1951 - 198 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 86
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 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
Drept de autor | |
19 alte secțiuni nu sunt arătate
Alte ediții - Afișează-le pe toate
Termeni și expresii frecvente
able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole