The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 33
... escape from it completely if its speed is over 25,000 m.p.h. If its speed is less than this , it may either fall back again or , if it is aimed in the correct direction , it may continue to orbit the Earth indefinitely in a circular or ...
... escape from it completely if its speed is over 25,000 m.p.h. If its speed is less than this , it may either fall back again or , if it is aimed in the correct direction , it may continue to orbit the Earth indefinitely in a circular or ...
Pagina 46
... escape from the Earth , and when it has done this must still have enough velocity left to put it into the required " voyage orbit " . This means that it must start with a speed greater than that needed merely to escape - though in most ...
... escape from the Earth , and when it has done this must still have enough velocity left to put it into the required " voyage orbit " . This means that it must start with a speed greater than that needed merely to escape - though in most ...
Pagina 95
... escape velocity . However , if the ship could build up all its speed in the horizontal direction , gravity would not produce any loss of speed whatsoever and one could reach escape velocity in as leisurely a fashion as one pleased ...
... escape velocity . However , if the ship could build up all its speed in the horizontal direction , gravity would not produce any loss of speed whatsoever and one could reach escape velocity in as leisurely a fashion as one pleased ...
Cuprins
Automatic Rocket Surveying Mars | 3 |
The Earth and its Neighbours | 9 |
The Rocket | 17 |
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acceleration already astronautics astronomers atmosphere 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 giant gravitational field gravity heat Hermann Oberth hundred miles idea 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 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