Local citizens watch the sketch maps illustrating the whole process of the full solar eclipse, during a popular science exhibition on the introduction to the forthcoming 2009 Full Solar Eclipse at the Shanghai Science & Technology Museum, in Shanghai, east China, July 11, 2009. The upcoming full solar eclipse, predicted to betide on July 22 and believed to be the longest of its kind in 500 years, will be visible in most parts of the Shanghai Municipality. [Xinhua]