The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 43
... means first of all losing speed slightly to drop down towards the Sun , then slowing down a little more as one goes past its orbit to match one's velocity with the inner planet . In exactly the same way , going to an outer planet means ...
... means first of all losing speed slightly to drop down towards the Sun , then slowing down a little more as one goes past its orbit to match one's velocity with the inner planet . In exactly the same way , going to an outer planet means ...
Pagina 175
... means it would be necessary to have an extremely efficient source of nuclear energy : anything like our present atomic power plants would be completely useless . Some means would be required of releasing a large percentage of the energy ...
... means it would be necessary to have an extremely efficient source of nuclear energy : anything like our present atomic power plants would be completely useless . Some means would be required of releasing a large percentage of the energy ...
Pagina 189
... means of crossing space have become involved in current military research because in no other way could they find the necessary support . It is worth quoting here some words written by Professor von Braun on becoming an Honorary Fellow ...
... means of crossing space have become involved in current military research because in no other way could they find the necessary support . It is worth quoting here some words written by Professor von Braun on becoming an Honorary Fellow ...
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