The 'Great American Eclipse': What to Expect on Aug. 21

This August, the U.S. will experience the first total solar eclipse seen from the U.S. coast to coast in nearly a century. Here's how the eclipse works, and why scientists are keeping a close eye on it. Illustration: Heather Seidel/The Wall Street Journal Don’t miss a WSJ video, subscribe here: http://bit.ly/14Q81Xy More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com Visit the WSJ Video Center: http://wsj.com/video On Facebook: http://ift.tt/2tse5gr On Twitter: https://twitter.com/WSJvideo On Snapchat Discover: http://on.wsj.com/2ratjSM