The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 83
... radio and radar in space , and this is a subject of almost as much importance as the building of rocket motors themselves . It is true that without rockets space - travel would be impossible ( at least in the present state of our ...
... radio and radar in space , and this is a subject of almost as much importance as the building of rocket motors themselves . It is true that without rockets space - travel would be impossible ( at least in the present state of our ...
Pagina 85
... radio range in space is probably the inter- ference from the Milky Way , which has already been mentioned . This provides a background of radio noise which would swamp our own transmitters over great distances . Making the receivers ...
... radio range in space is probably the inter- ference from the Milky Way , which has already been mentioned . This provides a background of radio noise which would swamp our own transmitters over great distances . Making the receivers ...
Pagina 149
... radio waves are about a million times longer than light waves , it is necessary to build in- struments of enormous size to get reasonable definition . The biggest radio - telescope yet built is over 200 feet in diameter ( compared with ...
... radio waves are about a million times longer than light waves , it is necessary to build in- struments of enormous size to get reasonable definition . The biggest radio - telescope yet built is over 200 feet in diameter ( compared with ...
Cuprins
The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
1 | 118 |
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acceleration airless asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew diameter difficult distance Earth energy engineering enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gases gravitational field gravity heat hundred hydrogen imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing LEWIS CARROLL light light-years lunar Mars and Venus Martian means Mercury meteors miles million minutes missiles Moon Moon's motors never normal observed orbit oxygen payload perhaps planetary Plate Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-stations space-suits space-travel spaceship speed spinning stars stations structure sunlight surface take-off tanks telescope temperature thousand thrust trolley Uranus vehicle voyage weight weightless