The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 15
... Earth the easier it is to go onwards . ( A practical example of the saying that nothing succeeds like success . ) As far as gravity is concerned , leaving the Earth is rather like climbing a hill which at first is very steep but later ...
... Earth the easier it is to go onwards . ( A practical example of the saying that nothing succeeds like success . ) As far as gravity is concerned , leaving the Earth is rather like climbing a hill which at first is very steep but later ...
Pagina 39
... Earth . It was obvious that the next step beyond Earth satellites would be true interplanetary space probes , though few expected them to Y Moon Earth Figure 9. The Gravitational Fields of Earth and Moon arrive so quickly . However ...
... Earth . It was obvious that the next step beyond Earth satellites would be true interplanetary space probes , though few expected them to Y Moon Earth Figure 9. The Gravitational Fields of Earth and Moon arrive so quickly . However ...
Pagina 157
... Earth forever with clockwork precision , this is not perfectly correct . The disturb- ing effect of the Sun and Moon , and the attraction of the Earth's own equatorial bulge , would slowly alter the orbit of a satellite , causing its ...
... Earth forever with clockwork precision , this is not perfectly correct . The disturb- ing effect of the Sun and Moon , and the attraction of the Earth's own equatorial bulge , would slowly alter the orbit of a satellite , causing its ...
Cuprins
The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
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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