The Great American Solar Eclipse is almost upon us and if you’re planning to see it, timing is everything. From start to finish, the entire solar eclipse of Aug. 21 runs about four hours, but exactly what you can see and when depends on where you are. The eclipse begins on the West Coast at 9:05 a.m. PDT (12:05 p.m. EDT/1605 GMT) and ends on the East Coast at 4:09 p.m. EDT (2009 GMT). You can watch the entire solar eclipse on Space.com, courtesy of NASA.