The eclipse will spread from Oregon around midmorning on Aug. 21 (West Coast time) to the South Carolina coast about 90 minutes later, about 2:45 p.m. ET.
The relatively small 70-mile-wide path will provide the greatest show. Within this area, a total eclipse will occur as the moon aligns with the sun to an umbra. In this shadow region known as totality, the sun will be 100% covered, and it will become dark.
An estimated 12 million people are lucky enough to have a front row seat, living within that narrow path of totality. The largest cities include Nashville, Tennessee; Greenville, Columbia and Charleston, South Carolina; the north side of Kansas City; and the south side of St. Louis. Here, you will have the best show right in your backyard.
But NASA estimates that 200 million Americans live within a day’s drive of totality, and many of them are expected to head to where the show is best.