The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 81
... less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple one . An alternative though less accurate method of position- finding would be to ...
... less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely simple one . An alternative though less accurate method of position- finding would be to ...
Pagina 109
... less than the Earth's , but nothing can be deduced from this fact . It is reasonable to suppose that all the elements which occur on Earth will also exist on the Moon , though doubtless in different mineral forms . To the question " Is ...
... less than the Earth's , but nothing can be deduced from this fact . It is reasonable to suppose that all the elements which occur on Earth will also exist on the Moon , though doubtless in different mineral forms . To the question " Is ...
Pagina 137
... less than a day . The cloud belts and occasional great atmospheric disturbances could be observed in minute detail and , as Mimas cannot have much weather of its own , would provide any inhabitants with an alternative and inexhaustible ...
... less than a day . The cloud belts and occasional great atmospheric disturbances could be observed in minute detail and , as Mimas cannot have much weather of its own , would provide any inhabitants with an alternative and inexhaustible ...
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