The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 12
... ionosphere or Heavi- side layer ) which makes long - distance radio communication possi- ble and provides many of the strange noises which occasionally intrude upon our listening . Around this level most of the meteors which come racing ...
... ionosphere or Heavi- side layer ) which makes long - distance radio communication possi- ble and provides many of the strange noises which occasionally intrude upon our listening . Around this level most of the meteors which come racing ...
Pagina 86
... ionosphere , which as we mentioned in Chapter 2 reflects radio signals back to Earth and so makes long - distance services possible . This layer , however , reflects only waves which have a length greater than a certain critical value ...
... ionosphere , which as we mentioned in Chapter 2 reflects radio signals back to Earth and so makes long - distance services possible . This layer , however , reflects only waves which have a length greater than a certain critical value ...
Pagina 197
... Ionosphere Interstellar travel , 174-82 Ionosphere , 14 effect on radio , 86 Jupiter , 135-6 Kepler , Johannes , 3 Life in universe , 171-2 , 191-2 on Mars , 129 on Moon , 109 on outer planets , 139-41 on Venus , 123 Light for ...
... Ionosphere Interstellar travel , 174-82 Ionosphere , 14 effect on radio , 86 Jupiter , 135-6 Kepler , Johannes , 3 Life in universe , 171-2 , 191-2 on Mars , 129 on Moon , 109 on outer planets , 139-41 on Venus , 123 Light for ...
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