The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 34
... necessary to move in such an orbit near the bottom of the crater - i.e . , near the Earth's surface ( e ) —is 18,000 mph , and this is called “ circular velocity . " Other similar orbits are shown at ( f ) and ( g ) . These are by no ...
... necessary to move in such an orbit near the bottom of the crater - i.e . , near the Earth's surface ( e ) —is 18,000 mph , and this is called “ circular velocity . " Other similar orbits are shown at ( f ) and ( g ) . These are by no ...
Pagina 58
... necessary for visual and radar observation of the approach to the Moon . This apparatus has to be kept clear of the rocket jet , which would not only produce such an intense glare that an ob- server would be blinded , but would also ...
... necessary for visual and radar observation of the approach to the Moon . This apparatus has to be kept clear of the rocket jet , which would not only produce such an intense glare that an ob- server would be blinded , but would also ...
Pagina 76
... necessary . At the end of these maneuvers , which would occupy only a few hours , it would be back in a stable , circular orbit waiting to be refueled and serviced , and the crew could be taken down to Earth by one of the winged " ferry ...
... necessary . At the end of these maneuvers , which would occupy only a few hours , it would be back in a stable , circular orbit waiting to be refueled and serviced , and the crew could be taken down to Earth by one of the winged " ferry ...
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The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
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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