Twenty-six years ago today, August 11, 1999 (July 1, 1999 in the lunar calendar), the last total solar eclipse in the 20th century. On August 11, 1999, a magnificent total solar eclipse was observed in some regions of Europe and Asia. This total solar eclipse is the last of the century and will last for about two minutes. It will begin in the Atlantic Ocean. The moon's shadow swept across the southwest corner of Britain, passed through the English Channel, landed on the European continent from Normandy in northern France, and then swept across Europe's Germany, Austria, Hungary, Romania and Bulgaria; It then entered Asia through the Black Sea, crossed Turkey, Iraq, Iran, Pakistan and India, and finally disappeared into the Indian Ocean. This food belt is more than 10,000 kilometers long, but is only about 100 kilometers wide. In the food belt area, a total solar eclipse will occur from morning to afternoon. The location with the longest duration of the total solar eclipse is near the city of Ramnicuvorcea, more than 100 kilometers northwest of Bucharest, the capital of Romania. The total solar eclipse belt there is a width of 112 kilometers. At the center line, the eclipse delay time is 2 minutes and 23 seconds. In the past 150 years, Europe has seen less than 10 total solar eclipses, especially in Central Europe, where the last time it was seen was in 1842; and Europe will no longer see new total solar eclipses for at least 30 years. In Hungary, the next total solar eclipse will not be seen until 2135 AD. Therefore, this total solar eclipse aroused great enthusiasm among the European public. Astronomers are more interested in this total solar eclipse because there will be many special phenomena that are usually difficult or even impossible to occur. This is a particularly favorable opportunity to detect the sun itself and the outer solar atmosphere such as the corona and chromosphere. In fact, before the 1980s, most of our understanding of the solar atmosphere and the physical state of the solar atmosphere came from observations of total solar eclipses. During a total solar eclipse, it may also have certain impacts on the earth's environment such as temperature, geomagnetic field, ionosphere, radio communications, etc., thus providing a special opportunity to study the solar-terrestrial effect or the solar-terrestrial relationship. For more than 150 years, whenever a total solar eclipse occurs somewhere, scientists have always used various means and even developed special observation equipment to carry out various scientific detections and research. This total solar eclipse occurred during the peak year when solar activity changed very violently (the sun's activity has an 11-year cycle and is currently approaching its peak period). Therefore, this total solar eclipse is of great significance for scientific exploration. A total solar eclipse is a normal astronomical phenomenon. Today, astronomers not only already know the cause of total solar eclipses, but also can accurately calculate and predict the time of each total solar eclipse based on scientific laws, ensuring that every minute is accurate!