The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 12
... interplanetary navigation . Finally , the shapes of the orbits . They are very nearly circular , with the Sun at the centre . Only Mercury , Mars and once again - Pluto depart seriously from this rule , their orbits being appreciably ...
... interplanetary navigation . Finally , the shapes of the orbits . They are very nearly circular , with the Sun at the centre . Only Mercury , Mars and once again - Pluto depart seriously from this rule , their orbits being appreciably ...
Pagina 46
... interplanetary travel it would , almost inevitably , be fatal . We can now sum - up the requirements for any interplanetary voyage , as follows : ( 1 ) The ship must build up sufficient speed to escape from the Earth , and when it has ...
... interplanetary travel it would , almost inevitably , be fatal . We can now sum - up the requirements for any interplanetary voyage , as follows : ( 1 ) The ship must build up sufficient speed to escape from the Earth , and when it has ...
Pagina 86
... interplanetary purposes . Our " window " into space will pass an enormous band of radio - frequencies , covering all the television and radar services , and in fact stretching , with only a few gaps , right down through the centimetre ...
... interplanetary purposes . Our " window " into space will pass an enormous band of radio - frequencies , covering all the television and radar services , and in fact stretching , with only a few gaps , right down through the centimetre ...
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