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 31
... light . When an object moves away from you , the light waves coming back from it to your eyes are lengthened , and so it looks slightly redder than it really is , for the red waves of light are the longest . This happens to light from ...
... light . When an object moves away from you , the light waves coming back from it to your eyes are lengthened , and so it looks slightly redder than it really is , for the red waves of light are the longest . This happens to light from ...
Contents
Solar Systems Eternal Show 10 illustrations in color from paintings by CHARLES | 17 |
Whales and Sharks Make Exciting Neighbors for a Professors | 33 |
Stalking Big Game with Color Camera 28 illustrations in color from natural color photo | 89 |
Copyright | |
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