The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 45
... shown in Figure 10 are , however , by no means the only paths that would take us from Earth to Mars and Venus : they are merely the most economical ones . Faster and more direct routes are conceivable , but they would require very much ...
... shown in Figure 10 are , however , by no means the only paths that would take us from Earth to Mars and Venus : they are merely the most economical ones . Faster and more direct routes are conceivable , but they would require very much ...
Pagina 83
... shown at ( a ) . Now let us suppose that calculation has shown that the velocity should be along the line AC . Elementary dynamics tells us that to give the ship this required velocity , we must impart to it a speed in the direction BC ...
... shown at ( a ) . Now let us suppose that calculation has shown that the velocity should be along the line AC . Elementary dynamics tells us that to give the ship this required velocity , we must impart to it a speed in the direction BC ...
Pagina 105
... shown in this drawing : indeed , when the Moon is full , its mountains cannot be seen at all , for no shadows are visible to produce an impression of relief or solidity , and the disc appears flat and most uninteresting . But everything ...
... shown in this drawing : indeed , when the Moon is full , its mountains cannot be seen at all , for no shadows are visible to produce an impression of relief or solidity , and the disc appears flat and most uninteresting . But everything ...
Cuprins
FRONTISPIECE Automatic Rocket Surveying Mars PLATE I HighAltitude ManCarrying Rocket | 3 |
Spaceships Refuelling In Free Orbit | 4 |
The Earth and its Neighbours | 9 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical climb completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure flywheel free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles 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 Propontis 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