The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 109
... astronomers until quite recently would have returned an unequivocal “ No ” , pointing out that the lack of air and the temperature extremes ruled out the possibility . Most astronomers would still maintain this position , but a ...
... astronomers until quite recently would have returned an unequivocal “ No ” , pointing out that the lack of air and the temperature extremes ruled out the possibility . Most astronomers would still maintain this position , but a ...
Pagina 130
... astronomers today accept this interpretation , and most do not believe in the existence of the canals at all . Yet there can be little doubt that large numbers of curious linear markings do exist on the planet . Even if they do not ...
... astronomers today accept this interpretation , and most do not believe in the existence of the canals at all . Yet there can be little doubt that large numbers of curious linear markings do exist on the planet . Even if they do not ...
Pagina 133
... astronomers were unable to keep track of even the 1,500 or so already detected — the work involved in calculating their orbits was too great . With the modern development of electronic computers , this difficulty has been overcome and ...
... astronomers were unable to keep track of even the 1,500 or so already detected — the work involved in calculating their orbits was too great . With the modern development of electronic computers , this difficulty has been overcome and ...
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