The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 72
... acceleration of one gravity . After just over five minutes , it would have built up speed from 18,000 m.p.h. to the 24,900 m.p.h. needed to get it to the Moon . During the closing stages the motors would probably be throttled back to ...
... acceleration of one gravity . After just over five minutes , it would have built up speed from 18,000 m.p.h. to the 24,900 m.p.h. needed to get it to the Moon . During the closing stages the motors would probably be throttled back to ...
Pagina 94
... acceleration . This is yet another of the difficulties of space - flight which in the past has been grossly exaggerated . At an acceleration of two gravities , it would take nine minutes to reach escape velocity : at five gravities ...
... acceleration . This is yet another of the difficulties of space - flight which in the past has been grossly exaggerated . At an acceleration of two gravities , it would take nine minutes to reach escape velocity : at five gravities ...
Pagina 96
... acceleration— perhaps as much as three gravities - be required . This would last just over a minute . For the rest of the powered trajectory , from B onwards , the acceleration need be little more than one gravity and the crew would ...
... acceleration— perhaps as much as three gravities - be required . This would last just over a minute . For the rest of the powered trajectory , from B onwards , the acceleration need be little more than one gravity and the crew would ...
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