The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 36
... achieved . It will , of course , be achieved at a considerable cost . The pay- load of a high - performance rocket is not likely to be more than a twentieth of its total weight , which means that each step will be about twenty times the ...
... achieved . It will , of course , be achieved at a considerable cost . The pay- load of a high - performance rocket is not likely to be more than a twentieth of its total weight , which means that each step will be about twenty times the ...
Pagina 40
... achieved escape velocity , and was aimed in the correct direction , it would reach the Moon rather less than five days after leaving the Earth . Re- membering our picture of the Earth's gravitational field ( Figure 9 ) we see that once ...
... achieved escape velocity , and was aimed in the correct direction , it would reach the Moon rather less than five days after leaving the Earth . Re- membering our picture of the Earth's gravitational field ( Figure 9 ) we see that once ...
Pagina 177
... achieved . Although , at the moment , we have no idea how this might be done , it must be remembered that nuclear physics is still in its infancy . Since several decades of travelling through space would be an TO THE STARS 177.
... achieved . Although , at the moment , we have no idea how this might be done , it must be remembered that nuclear physics is still in its infancy . Since several decades of travelling through space would be an TO THE STARS 177.
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