The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 22
... once that doubling the speed of ejection of the bricks would double the speed of the trolley . But suppose that it was impossible to increase this any further , as would be the case if the brick - thrower were working at the limit of ...
... once that doubling the speed of ejection of the bricks would double the speed of the trolley . But suppose that it was impossible to increase this any further , as would be the case if the brick - thrower were working at the limit of ...
Pagina 41
... once one has escaped from the Earth the journeys to the planets , though the distances involved may be hundreds of millions of miles , require very little extra energy . A striking example of this is given by the fact that though an ...
... once one has escaped from the Earth the journeys to the planets , though the distances involved may be hundreds of millions of miles , require very little extra energy . A striking example of this is given by the fact that though an ...
Pagina 65
... once in space , where the gentlest of drives will eventually produce any required velocity , atomic propulsion may come into its own . The picture we now have of the various vehicles needed for interplanetary travel is a good deal more ...
... once in space , where the gentlest of drives will eventually produce any required velocity , atomic propulsion may come into its own . The picture we now have of the various vehicles needed for interplanetary travel is a good deal more ...
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