The Exploration of SpaceHarper, 1951 - 199 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 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 ...
Pagina 80
... necessary corrections to the course . Although this is a subject of very great complexity — if one goes into it in any detail - some of the answers can be expressed fairly simply . In one respect , a spaceship is at a great advantage ...
... necessary corrections to the course . Although this is a subject of very great complexity — if one goes into it in any detail - some of the answers can be expressed fairly simply . In one respect , a spaceship is at a great advantage ...
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