The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 10
... Chapter 4. Mercury is moving in its orbit at 107,000 m.p.h. , the Earth at a more modest 68,000 and Pluto at a mere 10,000 m.p.h. The second important point is that almost all the planets lie in or very near the same plane , so that the ...
... Chapter 4. Mercury is moving in its orbit at 107,000 m.p.h. , the Earth at a more modest 68,000 and Pluto at a mere 10,000 m.p.h. The second important point is that almost all the planets lie in or very near the same plane , so that the ...
Pagina 51
... Chapter 15 , the mini- mum height might be five hundred or even a thousand miles . ) The lower steps of the rocket , discarded during its climb out of the atmosphere , would fall back to earth along a line extending eastwards from the ...
... Chapter 15 , the mini- mum height might be five hundred or even a thousand miles . ) The lower steps of the rocket , discarded during its climb out of the atmosphere , would fall back to earth along a line extending eastwards from the ...
Pagina 149
... chapter . Indeed , many believe that the building of the space - station may be the first task of astronautics , antedating even the journey to the Moon . If one uses the word " space - station " to describe any arti- ficial structure ...
... chapter . Indeed , many believe that the building of the space - station may be the first task of astronautics , antedating even the journey to the Moon . If one uses the word " space - station " to describe any arti- ficial structure ...
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