
Friday, August 1 is a red-letter day for eclipse enthusiasts. On that date, the sun will be partially eclipsed over an immense area that includes western and central Asia, parts of northern and central Europe, all of Greenland and even a small slice of northeastern North America.
Many people go a lifetime never witnessing a total solar eclipse. And in fact we happen to live in a rare moment in the 4.5-billion-year history of our planet when total solar eclipses are just barely possible due to some remarkable solar system alignments.
http://www.space.com/scienceastronomy/080715-st-solar-eclipse.html