7月22日上午9时35分，在我国人口稠密的长江流域地区上空，将上演一场百年难遇的日全食。这将是自1814年以来，我国可见日全食持续时间最长、可观测人数最多、景色最为壮观的一次。
在上午8：30~10：30我们会在衢州观测到500年一遇的最为壮观的日全食，渐渐的时间到了日全食来了，我立即取出墨镜对着太阳，只见在黑色的背影中有一轮火红的太阳，然后象是天狗食月一样的，太阳上有一个个被牙齿咬的裂痕，1分钟过去了，在看太阳正在一点点的消失，当月亮把太阳全部挡住的时候，天一下就黑了在也找不到一点太阳的痕迹，渐渐的我又看见一颗星星似的东西还有一个黑色的太阳，只见太阳又象吃了仙女的瑶池仙露又开始慢慢的复圆了天又亮了，星星也不见了，大千世界真是奇妙啊！
可是为什么会发生日食我却是一窍不通，只怪我学问不够，爸爸这个万事通就立即给我讲了起来，
原来，日食是月亮把太阳遮挡住后，太阳光照不到地球所以就形成日食，一次日全食的过程可以包括以下五个时期：初亏、食既、食甚、生光、复圆。我们五个时期都看到了，但有很多云，太阳很多时侯都在云里。日食原理发生日全食是因为太阳靠近月球轨道与地球轨道的的一个交点，而同时月球在距此点的最近的点上。发生日环食是因为太阳靠近月球轨道与地球轨道的的一个交点，而同时月球在距此点的最远的点上。食既从初亏开始，就是偏食阶段了。月亮继续往东运行，太阳圆面被月亮遮掩的部分逐渐增大，阳光的强度与热度显着下降。当月面的东边缘与日面的东边缘相内切时，称为食既。此时整个太阳圆面被遮住，因此，食既也就是日全食开始的时刻。之所以会发生日全食，是因为存在一种神奇的对称性。太阳的直径是月亮的400倍，而它距地球的距离正好也是月亮的400倍。结果，当月亮完全处于地球和太阳之间时，对那些完全处于月亮阴影中的人来说，太阳的表面便被完全遮挡了。太阳变成了黑色，只留下一个金色的光环，天空变成了靛青色。鸟儿此时会失去方向，或者会飞回巢中，蝙蝠和其它夜行动物则可能睡眼惺忪地出来活动。
真是大千世界无奇不有啊！
China will see the longest total solar eclipse in 500 years on July 22, a scientist said Saturday.
The prime time of the total eclipse was expected to begin from 9 a.m. to 9:38 a.m. (Beijing Time), said Wang Sichao, a research fellow with the Nanjing-based Purple Mountain Observatory under the Chinese Academy of Sciences.
People watch the newly-installed equatorial sundial, measuring 1.5 meters in diameters, donated by the National Observatory to mark the spot for observation of the forthcoming 2009 total solar eclipse on the Yangtze Valley, believed to be the longest one visible in the century that is to betide on July 22, in Haining, east China's Zhejiang Province
The total eclipse will last up to six minutes, or the longest one that can be seen in China in almost 500 years from 1814 to 2309, Wang said.
He said viewers in parts of 11 provinces in China's southwestern, central-southern and eastern areas, such as Tibet, Hunan and Jiangsu, will be able to witness the total solar eclipse, while in most parts of Shanghai, viewers can see the spectacular phenomenon.
Photo taken on July 11, 2009 shows 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. 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.
For viewers in other provinces, including Beijing, they can observe a partial eclipse, he said.
A solar eclipse occurs when the moon is caught between the sun and the earth while each of them moves along their fixed orbits.
In a total solar eclipse, the sun, the moon and the earth are directly aligned as the sun swings into the cone of shadow cast by the moon.
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.
Wang said the next total solar eclipse that can be seen in China will fall on March 20, 2034.
But it can only be seen remote provinces, such as Tibet and Qinghai. It cannot not be compare
solareclipse就是自然奇观日食。Solar源于希腊语，指of，relatingto，orproceedingfromthesun（和太阳有关的或从太阳发出的），其相关的表达如：solarcalendar（阳历），solarcooker（太阳灶），solarheatingsystem（太阳能加热系统）。
eclipse，由于它指代天体的部分或全部受其它天体的遮掩而变得晦暗，我们可以将其引申为使黯然失色，用在英语写作或口语表达上会您增色不少。
作名词时，eclipse常和介词in连用，如Tomwasineclipse,exiledtoasmallpostintheEast.（Tom失势了，被打发到西部去担任一个小差使。）作动词时，如：Sheisquiteeclipsedbyhercleveryoungersister.（在聪明的妹妹面前，她变得黯然失色。）
另外，如果要强调日全食可用totalsolareclipse来表达；日偏食则是partialsolareclipse。
