The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 73
... shown in the lower row of drawings . Suppose there is a fly- wheel at the ship's center of gravity , and imagine that at first it is fixed rela- tive to the slowly turning ship . If now a motor starts to spin the flywheel in the ...
... shown in the lower row of drawings . Suppose there is a fly- wheel at the ship's center of gravity , and imagine that at first it is fixed rela- tive to the slowly turning ship . If now a motor starts to spin the flywheel in the ...
Pagina 81
... shown at ( a ) . Now let us suppose that calculation has shown that the velocity should be along the line AC . Elementary dynamics tells us that to give the ship this required velocity , we must impart to it a speed in the direction BC ...
... shown at ( a ) . Now let us suppose that calculation has shown that the velocity should be along the line AC . Elementary dynamics tells us that to give the ship this required velocity , we must impart to it a speed in the direction BC ...
Pagina 128
... shown in Plate XI , which is drawn on a Mercator projection . It should be explained that the details shown here have been col- lected over many years of patient observation , by many observers . The disk of the planet also shows a vast ...
... shown in Plate XI , which is drawn on a Mercator projection . It should be explained that the details shown here have been col- lected over many years of patient observation , by many observers . The disk of the planet also shows a vast ...
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