The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 74
... completely to rest in less than two minutes after falling some eighty miles . ) The landing , like the take - off , would almost certainly be auto- matic . A radar altimeter would give the exact distance to the Moon as well as the rate ...
... completely to rest in less than two minutes after falling some eighty miles . ) The landing , like the take - off , would almost certainly be auto- matic . A radar altimeter would give the exact distance to the Moon as well as the rate ...
Pagina 106
... completely airless , nor can we be sure that it is completely waterless . Water cannot exist in the liquid state under such low pressure , it is true , but hoarfrost might reasonably be expected to form in the night as a temporary ...
... completely airless , nor can we be sure that it is completely waterless . Water cannot exist in the liquid state under such low pressure , it is true , but hoarfrost might reasonably be expected to form in the night as a temporary ...
Pagina 174
... completely weightless . To take an even more extreme case , the very dense dwarf star Sirius B has a surface gravity at least 20,000 times as intense as the Earth's . Falling in such a field , one would be accelerating more rapidly than ...
... completely weightless . To take an even more extreme case , the very dense dwarf star Sirius B has a surface gravity at least 20,000 times as intense as the Earth's . Falling in such a field , one would be accelerating more rapidly than ...
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