The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 72
... ship to the Moon , high on the hori- zontal slope of the " pit " : for the last scores of thousands of miles of its ... ship into an orbit that had been calculated long in advance . It is very probable that the entire operation would be ...
... ship to the Moon , high on the hori- zontal slope of the " pit " : for the last scores of thousands of miles of its ... ship into an orbit that had been calculated long in advance . It is very probable that the entire operation would be ...
Pagina 74
... ship turning , then again to check its spin when it had rotated through the required angle . The second method of control is shown in the lower row of drawings . Suppose there was a flywheel at the ship's centre of gravity , and imagine ...
... ship turning , then again to check its spin when it had rotated through the required angle . The second method of control is shown in the lower row of drawings . Suppose there was a flywheel at the ship's centre of gravity , and imagine ...
Pagina 81
... ship . ( For sim- plicity , we will assume that ship and planets lie in the same plane . This would not be very far from the truth , and there is no difficulty in allowing for the error in practice . ) Let us suppose that Venus and the ...
... ship . ( For sim- plicity , we will assume that ship and planets lie in the same plane . This would not be very far from the truth , and there is no difficulty in allowing for the error in practice . ) Let us suppose that Venus and the ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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Termeni și expresii frecvente
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