The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 41
... 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 240,000 miles ) a rocket launched in the correct direction at 26,000 m.p.h. would reach Venus ( closest distance ...
... 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 240,000 miles ) a rocket launched in the correct direction at 26,000 m.p.h. would reach Venus ( closest distance ...
Pagina 105
... given in Figure 17 , which should be compared with Plate VI ( a ) and ( b ) . Over 670 features have been given names ( mostly those of famous philosophers , astronomers and scientists ) and only a few of the best known can be shown ...
... given in Figure 17 , which should be compared with Plate VI ( a ) and ( b ) . Over 670 features have been given names ( mostly those of famous philosophers , astronomers and scientists ) and only a few of the best known can be shown ...
Pagina 115
... Given a sufficient source of power it can , therefore , in principle be extracted . Water is also a common constituent of many minerals , and can be removed simply by heating . On the Moon it would be possible to obtain plenty of heat ...
... Given a sufficient source of power it can , therefore , in principle be extracted . Water is also a common constituent of many minerals , and can be removed simply by heating . On the Moon it would be possible to obtain plenty of heat ...
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