On Wednesday, July 22, 2009, we are going to witness the greatest eclipse of the 21st century. A total eclipse of the sun will be visible from within a narrow corridor that traverses half of Earth. The path of the Moon’s umbral shadow will...

Darkness fell over the last outpost of the Great Wall of China on Friday, where a rare total solar eclipse ended its journey across the earth, delighting skywatchers one week before the Olympics open in Beijing. The stellar spectacle - when the...