The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 33
... exist . Look , for example , at orbit ( h ) . This is the path of a body which was projected horizontally at ( g ) but with insufficient speed to maintain itself . It fell downwards , gaining speed as it did so , until it had picked up ...
... exist . Look , for example , at orbit ( h ) . This is the path of a body which was projected horizontally at ( g ) but with insufficient speed to maintain itself . It fell downwards , gaining speed as it did so , until it had picked up ...
Pagina 135
... 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 towards filling it ...
... 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 towards filling it ...
Pagina 141
... exist even on the frozen outer worlds . One can imagine beings with tough , insulating skins through which the heat loss would be very small . As long as they had some source of energy - chemical , solar , perhaps even nuclear - and the ...
... exist even on the frozen outer worlds . One can imagine beings with tough , insulating skins through which the heat loss would be very small . As long as they had some source of energy - chemical , solar , perhaps even nuclear - and the ...
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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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