The National Geographic Magazine, Volume 76National Geographic Society, 1940 - Geography Indexes kept up to date with supplements. |
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Page 3
... light year , which is six trillion miles , the distance light travels in a year at its speed of 186,000 miles per second . The range of the Mount Wilson telescope is half a billion light years , so we can say that the " known " region ...
... light year , which is six trillion miles , the distance light travels in a year at its speed of 186,000 miles per second . The range of the Mount Wilson telescope is half a billion light years , so we can say that the " known " region ...
Page 4
... light . Except for a few facts gleaned from mete- orites , we have gained our whole vast knowl- edge of the Universe from light , and light alone ( Color Plate VII ) . Just what light is , no one can surely say . But we do know that ...
... light . Except for a few facts gleaned from mete- orites , we have gained our whole vast knowl- edge of the Universe from light , and light alone ( Color Plate VII ) . Just what light is , no one can surely say . But we do know that ...
Page 26
... light across the sky because you are looking up through the thickness of the wheel and seeing the con- centrated light of all the vast numbers of stars between you and the " tire . " In summer , if you look toward the con- stellation ...
... light across the sky because you are looking up through the thickness of the wheel and seeing the con- centrated light of all the vast numbers of stars between you and the " tire . " In summer , if you look toward the con- stellation ...
Contents
Solar Systems Eternal Show 10 illustrations in color from paintings by CHARLES | 17 |
Stalking Big Game with Color Camera 28 illustrations in color from natural color photo | 89 |
Man Succeeds in Making Friends with | 273 |
Copyright | |
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