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 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets body bricks British Astronomical Association build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust trolley Uranus voyage weight