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Why a total solar eclipse is such a big deal

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On August 21, 2017, a total solar eclipse is coming to the continental United States for the first time in 38 years, which may make it the most viewed total solar eclipse in history. Vox explains the orbital mechanics of the earth-moon-sun system.

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TED-Ed Best of Web are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.

Meet The Creators