图刊:世界最大“锅盖”长成记

  • 呃~~对了~~还忘了乃喷的什么如果太空中能看到长城可以获得诺贝尔奖~~~来~~~乃写信给诺贝尔奖委员会去推荐吧~~~


    Some U.S. astronauts, notably Eugene Cernan and Ed Lu, have said 

    they&ve seen the wall from low orbit. But it tends to show up only in 

    certain lighting conditions. When the sun is low on the horizon, for 

    example, the wall casts extended shadows that make it possible to 

    discern its silhouette.

    ————出自Scientific American


    呵呵~~~

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