The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina xii
... look rather odd in the near future . But unless some attempt is made to deal with these points , the whole subject remains , as far as the ordinary reader is concerned , in the realm of theory . The experts may be satisfied with graphs ...
... look rather odd in the near future . But unless some attempt is made to deal with these points , the whole subject remains , as far as the ordinary reader is concerned , in the realm of theory . The experts may be satisfied with graphs ...
Pagina 160
... look like collections of jewels glittering against the blackness of space . There are eight stars ( two of them double ) within ten light- years of the Sun. ( This unit , the distance light travels in a year , is a convenient one for ...
... look like collections of jewels glittering against the blackness of space . There are eight stars ( two of them double ) within ten light- years of the Sun. ( This unit , the distance light travels in a year , is a convenient one for ...
Pagina 161
... look in other directions , however , our gaze quickly passes out through the Galaxy's relatively thin disk and we can see only a few stars - and beyond those the great emptiness in which the other island universes float . If you look at ...
... look in other directions , however , our gaze quickly passes out through the Galaxy's relatively thin disk and we can see only a few stars - and beyond those the great emptiness in which the other island universes float . If you look at ...
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