The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 22
... greater speed from a standing start if he took on a larger load of bricks ? And in what way does the initial load affect his final speed ? The answer here is a trifle more complicated , though the main conclusions can be stated at once ...
... greater speed from a standing start if he took on a larger load of bricks ? And in what way does the initial load affect his final speed ? The answer here is a trifle more complicated , though the main conclusions can be stated at once ...
Pagina 149
... greater penetrating power and so may be able to teach us something about the structure of parts of the Universe which we can never “ see ” in the ordinary way . Because radio waves are about a million times longer than light waves , it ...
... greater penetrating power and so may be able to teach us something about the structure of parts of the Universe which we can never “ see ” in the ordinary way . Because radio waves are about a million times longer than light waves , it ...
Pagina 159
... greater than terrestrial ones , interstellar distances are a million times greater still . Even light , which can pass from the Sun to Pluto in a few hours , takes over four years to reach the nearest of the stars . It is not surprising ...
... greater than terrestrial ones , interstellar distances are a million times greater still . Even light , which can pass from the Sun to Pluto in a few hours , takes over four years to reach the nearest of the stars . It is not surprising ...
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