The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 31
... involved is exactly the same as that needed to climb vertically through a distance equal to the radius of the Earth- say 4,000 miles - in a steady gravity field , if " g " remained constant at its sea - level value . 4.000 MILES EARTH ...
... involved is exactly the same as that needed to climb vertically through a distance equal to the radius of the Earth- say 4,000 miles - in a steady gravity field , if " g " remained constant at its sea - level value . 4.000 MILES EARTH ...
Pagina 85
... involved they would , if they were ignored , cause a spaceship to be " above " or " below " the planets , at the end of its voyage , by as much as 5,000,000 miles . To correct for this it would be advisable to make a small change of ...
... involved they would , if they were ignored , cause a spaceship to be " above " or " below " the planets , at the end of its voyage , by as much as 5,000,000 miles . To correct for this it would be advisable to make a small change of ...
Pagina 152
... involved in building the 200 - inch telescope on Mount Palomar were not primarily optical ones : they were largely due to the fact that the mirror and its auxiliaries had to remain rigid to a few millionths of an inch , no matter how ...
... involved in building the 200 - inch telescope on Mount Palomar were not primarily optical ones : they were largely due to the fact that the mirror and its auxiliaries had to remain rigid to a few millionths of an inch , no matter how ...
Cuprins
Automatic Rocket Surveying Mars | 3 |
The Earth and its Neighbours | 9 |
The Rocket | 17 |
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acceleration already astronautics astronomers atmosphere body bricks British Astronomical Association 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 involved ionosphere journey Jupiter landing light light-years lunar 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 trolley Uranus voyage weight