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NASA provides an example of a simple eclipse projector, which provides a safe visual image of the phenomenon for those who may not have eclipse glasses.

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Sun takes center stage at Grand Canyon

Interior Department, NASA offer tips on safely viewing, photographing 'great American eclipse'

When the moon passes in front of the sun on the morning of Aug. 21, it will be the first time a total solar eclipse has passed across the entire length of the United States since 1918.