Draw a schematic diagram of the solar eclipse.

The solar eclipse is when the moon revolves around the earth between the sun and the earth. If the sun, the moon and the earth are in a straight line, the moon will block the sunlight that hits the earth, and the shadow behind the moon will just fall on the earth. At this time, the solar eclipse will occur. The time of solar eclipse must be "Shuori", that is, the first day of the lunar calendar.

There are two conditions to be met when an eclipse occurs:

First, the eclipse always occurs on the first day of the lunar calendar. Not all solar eclipses will occur on the first day, because the orbit of the moon (the ecliptic) and the orbit of the earth (the ecliptic) are not on the same plane. There is an included angle of 5 9' between the ecliptic plane and the ecliptic plane.

Secondly, both the sun and the moon move near the intersection of the ecliptic and the ecliptic, and the sun has a certain angle (eclipse limit) from the intersection.

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Anecdotes about solar eclipse

People's early understanding of astronomical phenomena is relatively low, and they are fascinated and puzzled by astronomical wonders such as total solar eclipse, and sometimes even make jokes.

1. On May 22nd, 1724, a total solar eclipse occurred in France. After the total solar eclipse, a marquise and several ladies came to the Paris Observatory. Ridiculously, she said to her companions, "Ladies, please come in. Mr. Cassini (director of the Paris Observatory and a famous astronomer) is my good friend, and he will perform a total solar eclipse for you again."

2. In 186, the residents of Milan, Italy, saw the wonders of the solar eclipse on the island and even shouted "Long live the astronomers". They thought it was astronomers who directed this spectacular spectacle.

3. A total solar eclipse occurred on October 23, 1976. There was a small town called Bengbara not far from Melbourne, Australia. When a total solar eclipse occurred, it was recognized as a good observation point. As a result, professional and amateur observers from all over the world flocked, and the number of guests reached five times that of the residents of this town-about 6,. During this period, the daily sales of beer in this town set a record of 12 tons a day.