On August 21, 2017, the sun will be partially eclipsed by the Moon all over the nation; only along a narrow track from coast to coast, will the sun be totally eclipsed. For most of America, if you use special precautions to safely look, the sun will appear shaped like a crescent, as the invisible Moon slowly passes part way in front.The sun is much too bright to look at directly without special precaution. Looking at the sun with unfiltered binoculars or a telescope would blind a person. [...]
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