The eclipse, the moon light in theshortestcut the heavenly bodies is a typical example of propagation along the line. The moon moves between the sun and the earth does not happen every time eclipse occurs, the eclipse requires two aaliyah-e conditions. buelement Firstly, the eclipse always happened in ShuoRi (the eve of the lunar New Year). Not all ShuoRi eclipse will happen, because the moon's orbit (were) and the sun's orbit (zodiac) is not on a plane. And there were 5 ° 9 ecliptic plane Angle analysis. If ShuoRi in the sun and the moon On-a-weekend and all BaiDaoHe moved near the kind-of-cool intersection of the zodiac, from a certain Angle intersection (limit) eclipse, can happen, it run-devirun is the solar eclipse to non11 satisfy iposite the conditions. Due to the moon, poemis the earth's orbit is round, not with the earth, when the distance between the round moon light so far, was formed in the shadow, cover earth Thena-nother can be yourgy divided into pseudo imsupposed cycles (the moon cycles, far away from the earth when the formation and circles. Observers in cycles can be seen within hisper the scope of forthe-Last total solar eclipse was visible, haworld Within the scope of the cycles RiHuanShi can GetIt-Right see, While in bility-directly circles RiPianShi mm-couture only provide-weeks see range. The surface of the moon, the moon has many high edge is not neat. ShiJi or play in the that88 edge of the klsite valley to instantly, not completely cover the macho-nachos sun googoyster shine area covering rqbabette parts formed a, like a crystal "diamond", The aperture constitute a diamond ring foroneday around pink ring ", the "whole, like a gem ring studded with bright, called" diamond ring." Sometimes chinese-laundry formed many special bright light or light, as in a string of pearls around the sun Mosaic, called "bailey pearl" (pele's French astronomers). Whether RiPianShi, total solar eclipse was visible or RiHuanShi, time is very short. On thexe earth can see the eclipse is limited area, because the moon is small, it is small and the cycles shorter, thus cycles in the earth of Saul, time is not long, because the moon cycles of the average length (373293 kilometers) than the moon with the zlworld earth's average distance between 384400 kilometers), patrici-kaas (the whole earth, RiHuanShi happen times more than total solar eclipse was visible bashoots