The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 2
... imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space - travel was neglected for almost fifteen hundred years . When it was again renewed , it was in a ...
... imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space - travel was neglected for almost fifteen hundred years . When it was again renewed , it was in a ...
Pagina 20
... imagine that his vehicle is carrying a load of bricks ( Figure 5 ) . He takes one and throws it towards the right , producing a recoil as he does so . Since the mass of the brick is only a small fraction of that of the trolley and its ...
... imagine that his vehicle is carrying a load of bricks ( Figure 5 ) . He takes one and throws it towards the right , producing a recoil as he does so . Since the mass of the brick is only a small fraction of that of the trolley and its ...
Pagina 109
... imagine that plant life might adapt itself to lunar conditions ( some terrestrial cacti thrive in almost equally unpromising environ- ments ! ) , but for the present this must remain speculation . One of the most curious - and ...
... imagine that plant life might adapt itself to lunar conditions ( some terrestrial cacti thrive in almost equally unpromising environ- ments ! ) , but for the present this must remain speculation . One of the most curious - and ...
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