Formation principle of total solar eclipse
The total solar eclipse occurs because the sun is close to the intersection of the lunar orbit and the earth orbit, and the farthest point of the moon from this point is the straight-line propagation of light. The reason for the total solar eclipse is a magical symmetry. The diameter of the sun is 400 times that of the moon, and its distance from the earth is exactly 400 times that of the moon.
Therefore, when the moon is completely between the earth and the sun, for those who are completely in the shadow of the moon, the surface of the sun is completely blocked. The sun turned black, leaving only a golden halo, and the sky turned indigo. Birds will get lost or fly back to their nests, while bats and other nocturnal animals may come out bleary-eyed.
The occurrence of total solar eclipse will be full of historical significance, and the record of solar eclipse has always existed. The earliest records can be traced back to the spectacular scenes written by ancient Mesopotamia.
What are the stages of total solar eclipse?
Five periods: first loss, eating, eating, living, and finally contact.
Initial loss: As the moon revolves around the earth from west to east, the solar eclipse always starts from the western edge of the sun's circular surface. When the eastern edge of the moon just touches the circular surface of the sun, it is called the first loss.
Eclipse: The moon continues to move eastward, and the part of the sun's circular surface covered by the moon gradually increases, and the intensity and heat of sunlight are obviously reduced. When the eastern edge of the moon surface is inscribed with the eastern edge of the sun surface, it is called eclipse.
Eat a lot: when the center of the moon wheel is closest to the center of the sun's surface, they will eat a lot.
Cold light: For the partial solar eclipse, the solar eclipse is the moment when the sun is covered by the moon the most. The moment when the moon continues to move eastward and the western edge of the moon meets the western edge of the sun is called luminescence, which is the moment when the total solar eclipse ends.
Final contact: After the birth of light, the surface of the moon continues to be far away from the surface of the sun, and the part covered by the sun gradually decreases. The moment when the western edge of the moon surface is tangent to the eastern edge of the sun surface is called the last contact.
How often does the total solar eclipse occur?
There are two total solar eclipses in the world every three years, once a year and a half on average. But if you stay where you are, for a city or a region, it can only be observed once every 370 years on average, so there is a saying of "once in 370 years".