The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 33
Arthur Charles Clarke. body will never come back , but will creep over the top of the crater , as it were , and reach the horizontal level ( d ) . This velocity is 25,000 mph and is called “ the velocity of escape . " If a body started ...
Arthur Charles Clarke. body will never come back , but will creep over the top of the crater , as it were , and reach the horizontal level ( d ) . This velocity is 25,000 mph and is called “ the velocity of escape . " If a body started ...
Pagina 34
... body need move to preserve its position . This is precisely how the Moon maintains itself in its orbit as it circles the Earth . And in just the same way the planets revolve round the Sun , prisoners of its gravitational field yet ...
... body need move to preserve its position . This is precisely how the Moon maintains itself in its orbit as it circles the Earth . And in just the same way the planets revolve round the Sun , prisoners of its gravitational field yet ...
Pagina 67
... body floating in space at the Earth's distance from the Sun. One side will be in shadow , the other in full sunlight . This side will become extremely hot - at least if it is darkened and so readily absorbs heat waves . In the extreme ...
... body floating in space at the Earth's distance from the Sun. One side will be in shadow , the other in full sunlight . This side will become extremely hot - at least if it is darkened and so readily absorbs heat waves . In the extreme ...
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