The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 52
... perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps a better phrase ...
... perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps a better phrase ...
Pagina 57
... perhaps , two main types , one of which is sub - divided . They are as follows : ( A ) The multistep rocket with a winged final stage , which is used to take material up to the orbit round the Earth , and then returns by atmospheric ...
... perhaps , two main types , one of which is sub - divided . They are as follows : ( A ) The multistep rocket with a winged final stage , which is used to take material up to the orbit round the Earth , and then returns by atmospheric ...
Pagina 187
... perhaps unparalleled in history . Now there are a good many people who think that we have already learned more than enough about the Universe in which we live . There are others ( including perhaps most scientists ) who adopt the non ...
... perhaps unparalleled in history . Now there are a good many people who think that we have already learned more than enough about the Universe in which we live . There are others ( including perhaps most scientists ) who adopt the non ...
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