The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 33
... orbit as it circles the Earth . And in just the same way the planets revolve round the Sun , prisoners of its gravitational field yet always maintaining their distance . The speed necessary to move in such an orbit near the bottom of ...
... orbit as it circles the Earth . And in just the same way the planets revolve round the Sun , prisoners of its gravitational field yet always maintaining their distance . The speed necessary to move in such an orbit near the bottom of ...
Pagina 61
... orbit , so that they can break away from the Earth , make a reconnaissance of the Moon , and return to the Earth orbit . ( 5 ) The type of ship designed for a lunar landing will be flown up from Earth or assembled in free orbit , and ...
... orbit , so that they can break away from the Earth , make a reconnaissance of the Moon , and return to the Earth orbit . ( 5 ) The type of ship designed for a lunar landing will be flown up from Earth or assembled in free orbit , and ...
Pagina 149
... orbit - so long , of course , as it does not intercept the atmosphere . Nor need the orbits lie in the plane of the Earth's own rotation : they could be at any angle to the Equator , and could for example pass over the Poles . Which orbit ...
... orbit - so long , of course , as it does not intercept the atmosphere . Nor need the orbits lie in the plane of the Earth's own rotation : they could be at any angle to the Equator , and could for example pass over the Poles . Which orbit ...
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