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日全食必须是太阳、月亮、地球在一条直线上时才可能发生。这时,月亮在地球上的影子分为两部分,中心的区域叫做本影,外面的区域叫做半影。身处本影才能看到日全食,而在半影区域只能看到日偏食。2009年7月22日,我国长江流域可以看到500年一遇的日全食,而其他地区(如福建省境内)只能看到日偏食。不过,陈达元同学有幸目睹了“日全食”的壮丽景观,还写下了全过程与大家分享。
Total solar eclipse must be the sun, the moon, the earth in a straight line when it may happen. At this time, the shadow of the moon on Earth is divided into two parts, the center of the area called Umbral, the area outside is called penumbra. Can only see the total solar eclipse in the shadow of the shadow, and in the penumbral area can only see the partial eclipse. On July 22, 2009, a total solar eclipse of 500 years can be seen in the Yangtze River basin in China, while other parts of the Yangtze River basin (such as Fujian Province) can only see Japanese eclipse. However, Chen Danyuan students fortunate enough to witness the magnificent landscape of “Total Solar Eclipse” and also wrote down the whole process to share with you.