The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 21
... vehicle is carrying a load of bricks ( Figure 4 ) . He takes one and throws it towards the right , producing a recoil as he does so . Since the mass of the bricks is only a small fraction of that of the trolley and its cargo , the ...
... vehicle is carrying a load of bricks ( Figure 4 ) . He takes one and throws it towards the right , producing a recoil as he does so . Since the mass of the bricks is only a small fraction of that of the trolley and its cargo , the ...
Pagina 23
... vehicle is 200 pounds , the rider would have to throw off 200 pounds of bricks . This is not quite correct , for allowance must be made for the fact that extra work has to be done accelerating those bricks which are carried during the ...
... vehicle is 200 pounds , the rider would have to throw off 200 pounds of bricks . This is not quite correct , for allowance must be made for the fact that extra work has to be done accelerating those bricks which are carried during the ...
Pagina 40
... vehicle leaves the lunar crater clearly depends very critically on its initial velocity and angle of approach . A little thought will show that it is impossible for the Moon to trap a rocket launched from Earth , so that it will ...
... vehicle leaves the lunar crater clearly depends very critically on its initial velocity and angle of approach . A little thought will show that it is impossible for the Moon to trap a rocket launched from Earth , so that it will ...
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