The Exploration of SpaceHarper, 1951 - 199 pagini |
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... imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space - travel was neglected for almost fifteen hundred years . When it was again renewed , it was in a ...
... imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space - travel was neglected for almost fifteen hundred years . When it was again renewed , it was in a ...
Pagina 32
... Imagine that it is made of some smooth , hard material like perfectly frictionless glass , and con- sider what would happen if a body - say a marble - were propelled up its slope at a certain initial speed . Quite clearly , it would ...
... Imagine that it is made of some smooth , hard material like perfectly frictionless glass , and con- sider what would happen if a body - say a marble - were propelled up its slope at a certain initial speed . Quite clearly , it would ...
Pagina 91
... imagine what would happen in a collision at such velocities - so much greater than any that are ever met on the Earth . One suggestion is that the meteor and the area of the hull at the point of impact would be instantly vaporised ...
... imagine what would happen in a collision at such velocities - so much greater than any that are ever met on the Earth . One suggestion is that the meteor and the area of the hull at the point of impact would be instantly vaporised ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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Termeni și expresii frecvente
acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mare Imbrium Mars and Venus Martian means Mercury meteors million minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust tion trolley Uranus voyage weight