#1 - eclipse2017usa_360p30 from k factor calculator Watch Video
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Description: Three visualizations were sent to us recently by our friends and colleagues at NASA GSFC, Ernie Wright and his talented visualization team of animators.This is number 1 of 3. nnOn Monday, August 21, 2017, the Moon will pass in front of the Sun, casting its shadow across all of North America. This will be the first total solar eclipse visible in the contiguous United States in 38 years.nnThe Moon's shadow can be divided into areas called the umbra and the penumbra. Within the penumbra, the Sun
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