The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 50
... motors can operate at maximum efficiency . And thirdly it is in a condition of " weightlessness . ' 99 As a result of countless stories on the subject , most people are now aware of the fact that lack of weight is a normal condition in ...
... motors can operate at maximum efficiency . And thirdly it is in a condition of " weightlessness . ' 99 As a result of countless stories on the subject , most people are now aware of the fact that lack of weight is a normal condition in ...
Pagina 58
... motors in the other . Although many alternative layouts are possible , this " dumbbell " arrangement has certain advantages . From the engineering point of view , the sphere is the shape which lends itself most readily to pressurization ...
... motors in the other . Although many alternative layouts are possible , this " dumbbell " arrangement has certain advantages . From the engineering point of view , the sphere is the shape which lends itself most readily to pressurization ...
Pagina 74
... motors are aimed at the Moon . Using the rockets to produce a deceleration of one gravity , a speed of fall of 5,000 mph could be checked in four minutes , during which time the ship would cover a distance of 160 miles . It would ...
... motors are aimed at the Moon . Using the rockets to produce a deceleration of one gravity , a speed of fall of 5,000 mph could be checked in four minutes , during which time the ship would cover a distance of 160 miles . It would ...
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