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 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole