The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 10
... planets , we must alter the scale again , making the man sink far below visibility . With a reduction of a million ... planets or " asteroids , " few of which on this scale are much larger than grains of sand . We have to travel 483 ...
... planets , we must alter the scale again , making the man sink far below visibility . With a reduction of a million ... planets or " asteroids , " few of which on this scale are much larger than grains of sand . We have to travel 483 ...
Pagina 42
... planetary orbits — as opposed to “ mere ” circumnavigations of the Moon - and the somewhat surprising statement was made that , under favorable conditions , the planets could be reached with little more trouble than the Moon itself ...
... planetary orbits — as opposed to “ mere ” circumnavigations of the Moon - and the somewhat surprising statement was made that , under favorable conditions , the planets could be reached with little more trouble than the Moon itself ...
Pagina 118
... planets rather than their dimensions and distances apart - though it is worth looking at Figure 1 again to re- mind ourselves of these . For reasons which are still unknown , the ... planets , whose diameters range 118 1 1 The Inner Planets.
... planets rather than their dimensions and distances apart - though it is worth looking at Figure 1 again to re- mind ourselves of these . For reasons which are still unknown , the ... planets , whose diameters range 118 1 1 The Inner Planets.
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