As you are firming up your summer plans, you may want to pencil in the total solar eclipse on August 21. Dubbed the “Great American Eclipse,” it is not just the first total solar eclipse visible from the contiguous United States since February 26, 1979, but also the first that can be seen across the country, from the Pacific to the Atlantic, in almost a century. The last time the celestial phenomenon was experienced coast-to-coast was on June 8, 1918!