The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 11
... Solar System Three other points remain to be mentioned before our picture of the Solar System is complete . In the first place , it is not a stationary affair . All the planets are moving , and in the same direction round the Sun. The ...
... Solar System Three other points remain to be mentioned before our picture of the Solar System is complete . In the first place , it is not a stationary affair . All the planets are moving , and in the same direction round the Sun. The ...
Pagina 165
... Solar System to be something usual , or an astronomical freak . Until quite recently , the latter opinion was generally held , because the only conditions under which anyone could imagine the Solar System forming seemed to demand very ...
... Solar System to be something usual , or an astronomical freak . Until quite recently , the latter opinion was generally held , because the only conditions under which anyone could imagine the Solar System forming seemed to demand very ...
Pagina 182
... Solar System at the present moment , otherwise we would indeed have had every reason to expect visitors . But during the millions of years that lie behind us -- who knows ? Life may have come and gone and come again on our neighbours ...
... Solar System at the present moment , otherwise we would indeed have had every reason to expect visitors . But during the millions of years that lie behind us -- who knows ? Life may have come and gone and come again on our neighbours ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets body bricks British Astronomical Association 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 gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors 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 trolley Uranus voyage weight