The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 47
... ATMOSPHERE FIRST CONTACT WITH ATMOSPHERE X ROCKET BRAKING APPLIED ATMOSPHERE . Figure 11. Returning to Earth by Air - Braking This is where the Earth's atmosphere - which was a nuisance on the way up - proves to be an advantage ...
... ATMOSPHERE FIRST CONTACT WITH ATMOSPHERE X ROCKET BRAKING APPLIED ATMOSPHERE . Figure 11. Returning to Earth by Air - Braking This is where the Earth's atmosphere - which was a nuisance on the way up - proves to be an advantage ...
Pagina 48
Arthur Charles Clarke. the atmosphere . As it cuts through the upper atmosphere , air resistance will reduce its speed still further and , in the process , it will become hot owing to friction . However , if the entry into the atmosphere ...
Arthur Charles Clarke. the atmosphere . As it cuts through the upper atmosphere , air resistance will reduce its speed still further and , in the process , it will become hot owing to friction . However , if the entry into the atmosphere ...
Pagina 126
... atmosphere . The facts revealed by the spectroscope are rather disconcerting — there is no sign of oxygen , and we have tests which could detect the presence of this gas even if it were only a thousandth as common as in our atmosphere ...
... atmosphere . The facts revealed by the spectroscope are rather disconcerting — there is no sign of oxygen , and we have tests which could detect the presence of this gas even if it were only a thousandth as common as in our atmosphere ...
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