The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 15
... practical example of the saying that nothing succeeds like success . ) As far as gravity is concerned , leaving the Earth is rather like climbing a hill which at first is very steep but later becomes more and more gentle until finally ...
... practical example of the saying that nothing succeeds like success . ) As far as gravity is concerned , leaving the Earth is rather like climbing a hill which at first is very steep but later becomes more and more gentle until finally ...
Pagina 107
... miles in extent . They were made by Mr. L. F. Ball , of the Lunar Section of the British Astronomical Association , using a 10 - inch reflector . might be thought that the discussion is of little practical THE MOON 107.
... miles in extent . They were made by Mr. L. F. Ball , of the Lunar Section of the British Astronomical Association , using a 10 - inch reflector . might be thought that the discussion is of little practical THE MOON 107.
Pagina 182
... practical policy on the national or the cosmic scale . And when the first contact with the outer universe is made , one would like to think that Mankind played an active and not merely a passive rôle — that we were the discoverers , not ...
... practical policy on the national or the cosmic scale . And when the first contact with the outer universe is made , one would like to think that Mankind played an active and not merely a passive rôle — that we were the discoverers , not ...
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