The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 7
... thousand miles in a few days . As speeds of transport have increased , so our sense of distance has altered . Australia can never be as remote to us as it was to our grand- fathers . In the same way , one's mental attitude can adapt ...
... thousand miles in a few days . As speeds of transport have increased , so our sense of distance has altered . Australia can never be as remote to us as it was to our grand- fathers . In the same way , one's mental attitude can adapt ...
Pagina 34
... thousand m.p.h. ! It is , of course , a speed far greater than anything ever achieved by man or indeed by any man - made object . But it no longer seems as fantastic as it did even a decade ago . In 1940 , no rocket had ever travelled ...
... thousand m.p.h. ! It is , of course , a speed far greater than anything ever achieved by man or indeed by any man - made object . But it no longer seems as fantastic as it did even a decade ago . In 1940 , no rocket had ever travelled ...
Pagina 135
... thousands of them exist , they cannot constitute a " menace to navigation " , as has sometimes been suggested . The gulf between Mars and Jupiter is too enor- mous for a few thousand , or even a few million , asteroids to go very far ...
... thousands of them exist , they cannot constitute a " menace to navigation " , as has sometimes been suggested . The gulf between Mars and Jupiter is too enor- mous for a few thousand , or even a few million , asteroids to go very far ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks 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 Mare Imbrium 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 tion trolley Uranus voyage weight