The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 48
... landing as a glider , slowly shedding its speed by air resistance . This operation ( called “ entry by braking ellipses ” ) is shown in Figure 11. It is of enormous importance , as it implies that no rocket power need be used for landing ...
... landing as a glider , slowly shedding its speed by air resistance . This operation ( called “ entry by braking ellipses ” ) is shown in Figure 11. It is of enormous importance , as it implies that no rocket power need be used for landing ...
Pagina 74
... landing , like the take - off , would almost certainly be auto- matic . A radar altimeter would give the exact distance to the Moon as well as the rate of descent , and this information would be passed to an electronic computer which ...
... landing , like the take - off , would almost certainly be auto- matic . A radar altimeter would give the exact distance to the Moon as well as the rate of descent , and this information would be passed to an electronic computer which ...
Pagina 75
... landing gear which would stand the impact without being too bulky and heavy . It might resemble that shown in Plate VI : even the low lunar gravity would demand something more substantial than the fragile fins or wings which , in so ...
... landing gear which would stand the impact without being too bulky and heavy . It might resemble that shown in Plate VI : even the low lunar gravity would demand something more substantial than the fragile fins or wings which , in so ...
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