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错过明天，再等十年！安全观测日环食全指南
source link: https://tech.sina.com.cn/d/s/2020-06-21/doc-iirczymk8169415.shtml
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来源：返朴6月21日，难得一见的日环食就要上演，下次日环食经过中国要等十年之久，在相同的城市发生可能要百年后。那么，该怎么观测宝贵的日环食？不但不能用裸眼、望远镜、照相机、摄像机来直接观测，即便和佩戴太阳镜、黑胶片等物品也不行。道理何在？这
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