The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 20
... involved are very far from being equal . Yet once again the same law of reaction holds . If the gun weighed a thou- sand times as much as the bullet , it would recoil at a thousandth of the bullet's speed . Now , perhaps , we can ...
... involved are very far from being equal . Yet once again the same law of reaction holds . If the gun weighed a thou- sand times as much as the bullet , it would recoil at a thousandth of the bullet's speed . Now , perhaps , we can ...
Pagina 41
... involved may be hundreds of millions of miles , require very little extra energy . A striking example of this is given by the fact that though an initial speed of 25,000 m.p.h. is needed for a rocket to reach the Moon ( closest distance ...
... involved may be hundreds of millions of miles , require very little extra energy . A striking example of this is given by the fact that though an initial speed of 25,000 m.p.h. is needed for a rocket to reach the Moon ( closest distance ...
Pagina 188
... involved in de- signing long - range guided missiles are practically identical with those which will be met in the construction of the reconnaissance rockets described in Chapter 4. Separating the military and the peaceful uses of ...
... involved in de- signing long - range guided missiles are practically identical with those which will be met in the construction of the reconnaissance rockets described in Chapter 4. Separating the military and the peaceful uses of ...
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