On April 8, a spectacular natural phenomenon will take place in the skies over North America. It's a total solar eclipse, with the Moon perfectly aligned with the Earth and the Sun. On the day of the eclipse, the Moon will be only 360,000 kilometers from the Earth. Fifteen U.S. states will be able to view the eclipse, but two of them - Tennessee and Michigan - will be able to see it just barely. The further away from the total eclipse trajectory, the more partial it will be.
