The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 44
... Venus at any time one pleased . The moment of de- parture would have to be calculated so that , when the spaceship reached the plan- et's orbit , the planet was there too ! In the case of the Venus journey , which would last 145 days , ...
... Venus at any time one pleased . The moment of de- parture would have to be calculated so that , when the spaceship reached the plan- et's orbit , the planet was there too ! In the case of the Venus journey , which would last 145 days , ...
Pagina 119
... Venus in this respect . It is quicker to reach Venus , but takes rather more power — at least if a landing is to be made . The case of Venus , sometimes called Earth's sister planet , is a tantalizing one . As at her closest she is only ...
... Venus in this respect . It is quicker to reach Venus , but takes rather more power — at least if a landing is to be made . The case of Venus , sometimes called Earth's sister planet , is a tantalizing one . As at her closest she is only ...
Pagina 122
... Venus is a wind - swept desert with no outstanding geographical markings , it will be possible to obtain an accurate contour map by radar . Venus has no satellite , a deprivation shared only by Mercury and possibly Pluto . If there are ...
... Venus is a wind - swept desert with no outstanding geographical markings , it will be possible to obtain an accurate contour map by radar . Venus has no satellite , a deprivation shared only by Mercury and possibly Pluto . If there are ...
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