The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 10
... discuss in 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 ...
... discuss in 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 ...
Pagina 48
... discuss this procedure at any more length , however , it may be as well to look at the basic problems involved in the building of spaceships for simpler missions , such as entry into a circular orbit around the Earth . Once we have ...
... discuss this procedure at any more length , however , it may be as well to look at the basic problems involved in the building of spaceships for simpler missions , such as entry into a circular orbit around the Earth . Once we have ...
Pagina 61
... discuss the building of " space- stations " , we will not go into them here , except to remark that constructional difficulties should be greatly eased under condi- tions where nothing has any weight and so will stay where it is placed ...
... discuss the building of " space- stations " , we will not go into them here , except to remark that constructional difficulties should be greatly eased under condi- tions where nothing has any weight and so will stay where it is placed ...
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