The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 20
... given himself in jumping to the right will be exactly equal to the speed with which the trolley rolls off to the left . If on the other hand the trolley weighed twice as much as the man , its speed would be only half his , and so on for ...
... given himself in jumping to the right will be exactly equal to the speed with which the trolley rolls off to the left . If on the other hand the trolley weighed twice as much as the man , its speed would be only half his , and so on for ...
Pagina 41
... given by the fact that though an initial speed of 25,000 m.p.h. is needed for a rocket to reach the Moon ( closest distance 240,000 miles ) a rocket launched in the correct direction at 26,000 m.p.h. would reach Venus ( closest distance ...
... given by the fact that though an initial speed of 25,000 m.p.h. is needed for a rocket to reach the Moon ( closest distance 240,000 miles ) a rocket launched in the correct direction at 26,000 m.p.h. would reach Venus ( closest distance ...
Pagina 105
... given in Figure 17 , which should be compared with Plate VI ( a ) and ( b ) . Over 670 features have been given names ( mostly those of famous philosophers , astronomers and scientists ) and only a few of the best known can be shown ...
... given in Figure 17 , which should be compared with Plate VI ( a ) and ( b ) . Over 670 features have been given names ( mostly those of famous philosophers , astronomers and scientists ) and only a few of the best known can be shown ...
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