The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 81
... simple geometry fixes the space- ship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple ...
... simple geometry fixes the space- ship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple ...
Pagina 82
... simple astronomical method of doing this , unless use can be made of the Doppler effect- the alteration of the frequency of light caused when one is moving towards a source or away from it . This effect is extremely small at the sort of ...
... simple astronomical method of doing this , unless use can be made of the Doppler effect- the alteration of the frequency of light caused when one is moving towards a source or away from it . This effect is extremely small at the sort of ...
Pagina 100
... Simple though this solution appears to be in principle , it does raise a number of problems . The psychological effects of seeing the people on the opposite wall standing " upside - down " might be unfortunate , though one could ...
... Simple though this solution appears to be in principle , it does raise a number of problems . The psychological effects of seeing the people on the opposite wall standing " upside - down " might be unfortunate , though one could ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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Termeni și expresii frecvente
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