The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 131
... satellite , is very much less conspicuous still and may not even show a visible disc to an observer on the planet -being perhaps merely a bright star . These tiny Moons may well be the first extra - terrestrial bodies , next to our own ...
... satellite , is very much less conspicuous still and may not even show a visible disc to an observer on the planet -being perhaps merely a bright star . These tiny Moons may well be the first extra - terrestrial bodies , next to our own ...
Pagina 149
... satellite . It will be remembered that , just outside the atmosphere , a body travelling horizontally at 18,000 m.p.h. would remain perpetually in a stable , circular orbit , without requiring any power , and making a complete rotation ...
... satellite . It will be remembered that , just outside the atmosphere , a body travelling horizontally at 18,000 m.p.h. would remain perpetually in a stable , circular orbit , without requiring any power , and making a complete rotation ...
Pagina 160
... satellite would continue to circle the Earth for ever with clockwork precision , this is not perfectly correct . The disturbing effect of the Sun and Moon , and the attraction of the Earth's own equatorial bulge , would slowly alter the ...
... satellite would continue to circle the Earth for ever with clockwork precision , this is not perfectly correct . The disturbing effect of the Sun and Moon , and the attraction of the Earth's own equatorial bulge , would slowly alter the ...
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