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 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 ...
Pagina 176
... speed equal to 98 per cent . of that of light , or just over 600,000,000 m.p.h. At this speed , it would reach the nearest star in four and three - quarter years . However , we are dealing with such enormous velocities that the period ...
... speed equal to 98 per cent . of that of light , or just over 600,000,000 m.p.h. At this speed , it would reach the nearest star in four and three - quarter years . However , we are dealing with such enormous velocities that the period ...
Cuprins
FRONTISPIECE Automatic Rocket Surveying Mars PLATE I HighAltitude ManCarrying Rocket | 3 |
Spaceships Refuelling In Free Orbit | 4 |
The Earth and its Neighbours | 9 |
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Termeni și expresii frecvente
acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical climb completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure flywheel free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles imagine important interplanetary flight interplanetary travel interstellar involved ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors million minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant Propontis 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