The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 76
... lunar spaceship would need is an interesting problem which cannot , perhaps , be completely solved until we know a good deal more about the surface of the Moon . By the time a landing is attempted we will certainly have large - scale ...
... lunar spaceship would need is an interesting problem which cannot , perhaps , be completely solved until we know a good deal more about the surface of the Moon . By the time a landing is attempted we will certainly have large - scale ...
Pagina 107
... lunar formation is the " rill " or " cleft " , of which several examples will be seen in Plate VII.2 Some of these fissures are of great size and would be impressive , if not indeed terrifying , spectacles to an observer on the Moon ...
... lunar formation is the " rill " or " cleft " , of which several examples will be seen in Plate VII.2 Some of these fissures are of great size and would be impressive , if not indeed terrifying , spectacles to an observer on the Moon ...
Pagina 108
... lunar gravity , if there were an atmosphere on the Moon its density would fall off with altitude much more slowly than does the Earth's . If Figure 2 were redrawn for the case of the Moon , the density lines would be about six times as ...
... lunar gravity , if there were an atmosphere on the Moon its density would fall off with altitude much more slowly than does the Earth's . If Figure 2 were redrawn for the case of the Moon , the density lines would be about six times as ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mare Imbrium Mars and Venus Martian means Mercury meteors million minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust tion trolley Uranus voyage weight