The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 22
... speed when all the bricks have been used up . It should be fairly obvious that this final speed depends on two factors only- ( 1 ) the speed with which the bricks are thrown out , and ( 2 ) the quantity of bricks thrown out . Common ...
... speed when all the bricks have been used up . It should be fairly obvious that this final speed depends on two factors only- ( 1 ) the speed with which the bricks are thrown out , and ( 2 ) the quantity of bricks thrown out . Common ...
Pagina 23
... speed with which the bricks are thrown off ? This idea may at first seem a little startling , but it must be remembered that as long as any propellant remains aboard , the trolley can go on accelerating , so there is no theoretical ...
... speed with which the bricks are thrown off ? This idea may at first seem a little startling , but it must be remembered that as long as any propellant remains aboard , the trolley can go on accelerating , so there is no theoretical ...
Pagina 33
... speed to maintain itself . It fell downwards , gaining speed as it did so , until it had picked up enough speed to climb upwards again and retrace its orbit . Its path is thus not a circle , but an ellipse . All these cases could be ...
... speed to maintain itself . It fell downwards , gaining speed as it did so , until it had picked up enough speed to climb upwards again and retrace its orbit . Its path is thus not a circle , but an ellipse . All these cases could be ...
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