The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 40
... velocity will be at least 5,000 mph , contributed by the Moon's own gravitational field , together with any excess speed that it started with . ( These speeds cannot be added by simple arithmetic , but this point does not concern us ...
... velocity will be at least 5,000 mph , contributed by the Moon's own gravitational field , together with any excess speed that it started with . ( These speeds cannot be added by simple arithmetic , but this point does not concern us ...
Pagina 81
... velocity . To alter this , the rockets have to be used in the manner shown in Figure 14 . ( a ) ( b ) Figure 14. Altering the Velocity of a Spaceship Suppose that the velocity of the ship is represented , in magnitude and direction , by ...
... velocity . To alter this , the rockets have to be used in the manner shown in Figure 14 . ( a ) ( b ) Figure 14. Altering the Velocity of a Spaceship Suppose that the velocity of the ship is represented , in magnitude and direction , by ...
Pagina 93
... velocity in as leisurely a fashion as one pleased . This is clearly not practicable , but some- thing not far from it would be achieved if the spaceship rose ver- tically for the first fifty miles and then veered eastwards , as shown in ...
... velocity in as leisurely a fashion as one pleased . This is clearly not practicable , but some- thing not far from it would be achieved if the spaceship rose ver- tically for the first fifty miles and then veered eastwards , as shown in ...
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