The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 163
... star , although it is a good deal brighter than the average . ( Only three of the twenty nearest stars exceed it in brilliance , and the vast majority are far fainter . ) It is one of a very large number - perhaps 100,000,000,000— of stars ...
... star , although it is a good deal brighter than the average . ( Only three of the twenty nearest stars exceed it in brilliance , and the vast majority are far fainter . ) It is one of a very large number - perhaps 100,000,000,000— of stars ...
Pagina 164
... stars is even greater . Stars 10,000 times as bright as the Sun are known as well as stars 10,000 times fainter . With these variations of brilliance go variations of colour . Our Sun , whose light we regard as normal , is actually a ...
... stars is even greater . Stars 10,000 times as bright as the Sun are known as well as stars 10,000 times fainter . With these variations of brilliance go variations of colour . Our Sun , whose light we regard as normal , is actually a ...
Pagina 165
... stars around the sky . The heart of our own Galaxy , where the stars are clustered together more thickly than they are in the neighbourhood of the Sun , lies towards the constellation Sagittarius . Plate XIV ( b ) gives some idea of the ...
... stars around the sky . The heart of our own Galaxy , where the stars are clustered together more thickly than they are in the neighbourhood of the Sun , lies towards the constellation Sagittarius . Plate XIV ( b ) gives some idea of the ...
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