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Why is the moon black during a total solar eclipse?
The formation principle of total solar eclipse is that the sun is close to the intersection of lunar orbit and earth orbit, and the moon is farthest from this point. It is the straight-line propagation of light. The total solar eclipse happened because of 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.

There were 224 eclipses in the 20th century, including 77 partial eclipses, 72 annular eclipses, 68 total eclipses and 7 total eclipses. In addition, among these eclipses, two annular eclipses and one total solar eclipse will deviate from the eclipse center.

In addition, there were two eclipses in 1982, three eclipses in 12 and four eclipses in 6 years. The years with the most solar eclipses are 20 1 1, 2029, 2047, 2065, 2076 and 2094, and there are four solar eclipses every year.

The origin of the name of the initial loss stage of total solar eclipse;

Western astronomy divides the total solar eclipse (total lunar eclipse) into five processes, which can be directly translated into Chinese as the first food, the second food, the heart food, the third food and the last food.

In fact, China's description of the five processes of the total solar eclipse: initial loss, food, food, light and last contact, has existed since ancient times, and was not translated from the west. The astronomical term created by ancient astronomers in China is called initial loss, that is, the east of the moon just touches the west of the sun, which is called initial loss.

Baidu encyclopedia-total solar eclipse