The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 9
... 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 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 ...
Pagina 198
... Solar System and in- dividual names ) ancient ideas concerning , 1 colonising , 144-9 exploring , 142-3 of other suns , 165-6 , 169 , 171-2 Pluto , 138 Radar for lunar landing , 75 for meteor detection , 88 Radio communication by , 85-8 ...
... Solar System and in- dividual names ) ancient ideas concerning , 1 colonising , 144-9 exploring , 142-3 of other suns , 165-6 , 169 , 171-2 Pluto , 138 Radar for lunar landing , 75 for meteor detection , 88 Radio communication by , 85-8 ...
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