The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 10
... satellites , only about half an inch across . Outwards from Mars is a great gulf , empty save for thousands of minor planets or " asteroids " , few of which on this scale are much larger than grains of sand . We have to travel 483 miles ...
... satellites , only about half an inch across . Outwards from Mars is a great gulf , empty save for thousands of minor planets or " asteroids " , few of which on this scale are much larger than grains of sand . We have to travel 483 miles ...
Pagina 138
... satellites , being about 3,000 miles in diameter , but for some reason it has never been officially named and the " Nautical Almanac " , the arbiter in such matters , always refers to it long - windedly as " the satellite of Neptune ...
... satellites , being about 3,000 miles in diameter , but for some reason it has never been officially named and the " Nautical Almanac " , the arbiter in such matters , always refers to it long - windedly as " the satellite of Neptune ...
Pagina 160
... satellite would continue to circle the Earth for ever with clockwork precision , this is not perfectly correct . The disturbing effect of the Sun and Moon , and the attraction of the Earth's own equatorial bulge , would slowly alter the ...
... satellite would continue to circle the Earth for ever with clockwork precision , this is not perfectly correct . The disturbing effect of the Sun and Moon , and the attraction of the Earth's own equatorial bulge , would slowly alter the ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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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