The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 44
... thousand miles or so of the voyage - than in the jour- ney from orbit to orbit , which may cover a distance ten thousand times as great . Once again it should be emphasised that , to travel from one planet to another , rocket power need ...
... thousand miles or so of the voyage - than in the jour- ney from orbit to orbit , which may cover a distance ten thousand times as great . Once again it should be emphasised that , to travel from one planet to another , rocket power need ...
Pagina 82
... thousand a second . Then if the ship were travelling towards Earth , it would receive more than a thousand pips a second : if away from it , less . Modern electronic equipment can make such measurements with great accuracy and one day ...
... thousand a second . Then if the ship were travelling towards Earth , it would receive more than a thousand pips a second : if away from it , less . Modern electronic equipment can make such measurements with great accuracy and one day ...
Pagina 135
... thousands of them exist , they cannot constitute a " menace to navigation " , as has some- times been suggested . The gulf between Mars and Jupiter is too enormous 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 some- times been suggested . The gulf between Mars and Jupiter is too enormous for a few thousand , or even a few million , asteroids to go very far ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets 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 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 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