The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 34
... escaping from the Earth is to build up escape velocity as quickly as possible- and then to cut the rockets and " coast " . A commonplace but accurate analogy is given by the cyclist who builds up enough speed on the level to take him ...
... escaping from the Earth is to build up escape velocity as quickly as possible- and then to cut the rockets and " coast " . A commonplace but accurate analogy is given by the cyclist who builds up enough speed on the level to take him ...
Pagina 77
... speed at once to lunar escape velocity ( 5,200 m.p.h. ) , which , it will be remembered , could be reached in four minutes under only one gravity . It would then travel back to Earth along an orbit similar to that which it traversed on ...
... speed at once to lunar escape velocity ( 5,200 m.p.h. ) , which , it will be remembered , could be reached in four minutes under only one gravity . It would then travel back to Earth along an orbit similar to that which it traversed on ...
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
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
Escaping from Earth | 30 |
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acceleration already asteroids 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 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 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 tion trolley Uranus voyage weight