The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 19
... impossible to think of any form of propulsion which does not . Even walking depends upon reaction : the friction of our shoes against the ground pushes the Earth backwards and so thrusts us forwards . It was Sir Isaac Newton who first ...
... impossible to think of any form of propulsion which does not . Even walking depends upon reaction : the friction of our shoes against the ground pushes the Earth backwards and so thrusts us forwards . It was Sir Isaac Newton who first ...
Pagina 88
... impossible ) nobody on one planet will ever be able to converse , in the usual sense of the word , with anybody on another . One could listen to the voice of a friend on Mars , but the words that reached Earth would always have been ...
... impossible ) nobody on one planet will ever be able to converse , in the usual sense of the word , with anybody on another . One could listen to the voice of a friend on Mars , but the words that reached Earth would always have been ...
Pagina 158
... impossible by any other means , and at very great economy . Shortly after the end of the Second World War , a good deal was heard in the Press about gigantic " space - mirrors " which the Germans were supposed to be considering as ...
... impossible by any other means , and at very great economy . Shortly after the end of the Second World War , a good deal was heard in the Press about gigantic " space - mirrors " which the Germans were supposed to be considering as ...
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