The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 105
... observed , with the very smallest of telescopes , if one watches the Moon wax from new to full . The line of sunrise then marches steadily across the disc , and one can watch the mountains climb out of the night as their peaks catch the ...
... observed , with the very smallest of telescopes , if one watches the Moon wax from new to full . The line of sunrise then marches steadily across the disc , and one can watch the mountains climb out of the night as their peaks catch the ...
Pagina 126
... observed even across the millions of miles of space which separate us from the planet . In the telescope Mars shows three main types of surface marking . Most prominent are the brilliant polar caps , which wax and wane alternately in ...
... observed even across the millions of miles of space which separate us from the planet . In the telescope Mars shows three main types of surface marking . Most prominent are the brilliant polar caps , which wax and wane alternately in ...
Pagina 135
... observed of the four : much of the information gained about him probably applies to Saturn , Uranus and Neptune . We can see no permanent surface markings on these planets : what we observe is the top of an immensely deep and turbulent ...
... observed of the four : much of the information gained about him probably applies to Saturn , Uranus and Neptune . We can see no permanent surface markings on these planets : what we observe is the top of an immensely deep and turbulent ...
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