The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 81
... less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple one . An alternative though less accurate method of position- finding would be to ...
... less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple one . An alternative though less accurate method of position- finding would be to ...
Pagina 109
... less than the Earth's , but nothing can be deduced from this fact . It is reasonable to suppose that all the elements which occur on Earth will also exist on the Moon , though doubtless in different mineral forms . To the question " Is ...
... less than the Earth's , but nothing can be deduced from this fact . It is reasonable to suppose that all the elements which occur on Earth will also exist on the Moon , though doubtless in different mineral forms . To the question " Is ...
Pagina 137
... less than a day . The cloud belts and occasional great atmospheric disturbances could be observed in minute detail and , as Mimas cannot have much weather of its own , would provide any inhabitants with an alternative and inexhaustible ...
... less than a day . The cloud belts and occasional great atmospheric disturbances could be observed in minute detail and , as Mimas cannot have much weather of its own , would provide any inhabitants with an alternative and inexhaustible ...
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