The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 11
... Solar System Three other points remain to be mentioned before our picture of the Solar System is complete . In the first place , it is not a stationary affair . All the planets are moving , and in the same direction round the Sun. The ...
... Solar System Three other points remain to be mentioned before our picture of the Solar System is complete . In the first place , it is not a stationary affair . All the planets are moving , and in the same direction round the Sun. The ...
Pagina 165
... Solar System to be something usual , or an astronomical freak . Until quite recently , the latter opinion was generally held , because the only conditions under which anyone could imagine the Solar System forming seemed to demand very ...
... Solar System to be something usual , or an astronomical freak . Until quite recently , the latter opinion was generally held , because the only conditions under which anyone could imagine the Solar System forming seemed to demand very ...
Pagina 182
... Solar System at the present moment , otherwise we would indeed have had every reason to expect visitors . But during the millions of years that lie behind us -- who knows ? Life may have come and gone and come again on our neighbours ...
... Solar System at the present moment , otherwise we would indeed have had every reason to expect visitors . But during the millions of years that lie behind us -- who knows ? Life may have come and gone and come again on our neighbours ...
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