The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 33
... necessary to move in such an orbit near the bottom of the crater ( i.e. near the Earth's surface ( e ) ) is 18,000 m.p.h. , and this is called " circular velocity " . Other similar orbits are shown at ( f ) and ( g ) . These are by no ...
... necessary to move in such an orbit near the bottom of the crater ( i.e. near the Earth's surface ( e ) ) is 18,000 m.p.h. , and this is called " circular velocity " . Other similar orbits are shown at ( f ) and ( g ) . These are by no ...
Pagina 60
... necessary for visual and radar observation of the approach to the Moon . This apparatus has to be kept clear of the rocket jet , which would not only produce such an intense glare that an observer would be blinded , but would also ...
... necessary for visual and radar observation of the approach to the Moon . This apparatus has to be kept clear of the rocket jet , which would not only produce such an intense glare that an observer would be blinded , but would also ...
Pagina 78
... necessary to carry fuel for the return journey . Even if we avoid the need to build a single impossibly large ship by arranging a rendezvous with a tanker off the Moon , it would still be necessary to carry many separate loads all the ...
... necessary to carry fuel for the return journey . Even if we avoid the need to build a single impossibly large ship by arranging a rendezvous with a tanker off the Moon , it would still be necessary to carry many separate loads all the ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets body bricks British Astronomical Association 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 gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors 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 trolley Uranus voyage weight